Community safety notice 6 for reported incident — incident
AI-generated · every claim is source-linkedUniversity of Washington published a UW Alert Blog update on or about 2024-12-18. Full text is preserved from the official emergency blog.
- Alerts
- 1
- Response
- —
- Killed
- 0
- Injured
- 0
Alert Sequence
1 message in sequence · 1 verified verbatim
Confirmed wording is transcribed character-for-character from a primary source. Use Verify this quote under each message to open that source in a new tab and compare the text yourself.
How the first alert is built
To check this alert, Claude Opus 5 (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.
UPDATE 8:50 a.m. Dec. 21: Seattle police officers have arrested the suspect being sought in connection with the Dec. 18 death of a King County Metro coach driver. Officers were flagged down early this morning by a King County Metro driver near 3rd Avenue South and South Main Street, who informed them that stabbing suspect Richard Sitzlack was believed to be on board. Police could see him asleep in the back of the bus. Additional patrol officers were dispatched to the area, and he was arrested at 4:51 a.m. today. Sitzlack was transported to Seattle Police headquarters and interviewed by homicide detectives. He will be booked into King County Jail for investigation of murder. UPDATE 2 p.m. Dec. 19: Seattle police homicide detectives are seeking the public's assistance in locating Richard Sitzlack, who is believed to have stabbed a Metro Coach driver in the University District Wednesday morning. See photos of Sitzlack on the Seattle Police Department blotter: https://spdblotter.seattle.gov/2024/12/18/detectives-investigating-homicide-in-the-university-district/ Sitzlack is a 53-year-old white male with brown eyes, brown hair, 6'5" tall, weighing 195 lbs. He was last seen wearing a navy-blue hooded sweatshirt, dark gray/blue jacket, black beanie, yellow backpack, blue camouflage pants, dark sneakers with white soles, carrying a red shopping bag. Sitzlack is transient and frequents the University District and Downtown Seattle. Do not attempt to approach Sitzlack, he is considered armed and dangerous. If anyone has information regarding his identity or location, please call 911 immediately. UPDATE 8:35 a.m.: The suspect description was updated to note that the man was reportedly wearing a dark blue jacket, camouflage pants and white shoes. UPDATE 7:15 a.m.: The Seattle Police Department is continuing to investigate the stabbing death of a King County Metro Coach driver in the 4100 block of University Way. If anyone has any information, please call 911 or the Seattle Police Department Violent Crimes Tip Line at 206-233-5000. You can remain anonymous. UPDATE 4:46 a.m.: The investigation remains ongoing. The suspect has not been located yet. The area is reopening. Updates will be provided here if available. If you have any information about the incident or the suspect, call police. UPDATE 4:25 a.m.: The search is continuing for the suspect involved in the stabbing. UPDATE 3:49 a.m.: Police searching for suspect in stabbing near 50th Avenue NE and NE 15th Street. Avoid area. UPDATE 3:41 a.m.: Officers have not located the suspect yet. The stabbing occurred in the 4100 block of University Way NE. UPDATE 3:28 a.m.: Police are still searching the area for the suspect. 3:17 a.m.: Police are searching for a man responsible for a stabbing that occurred at about 3 a.m. on a bus at 16th Avenue NE and NE 41st Street. The man was described as 6-foot-1, wearing a blue jacket. He reportedly left northbound in an alley.
Sourcepresent25/25
Final assessment
Present, and all 25 of 25 reads agree. The post repeatedly names its authority, from "Seattle police officers have arrested the suspect" to the "Seattle Police Department Violent Crimes Tip Line at 206-233-5000".
Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.
See all 25 individual reads
- present: "Seattle police officers" and "Seattle Police Department" are named repeatedly as the responding and investigating authority.
- present: Seattle Police Department and its homicide detectives are named repeatedly as the responding and issuing authority.
- present: Seattle police officers and the Seattle Police Department are named repeatedly as the responding and issuing authority.
- present: Seattle Police Department and its homicide detectives are repeatedly named as the investigating and issuing authority.
- present: "Seattle police officers" and "Seattle Police Department" repeatedly identify the investigating agency behind the message.
- present: Seattle police and its homicide detectives are repeatedly named as the investigating and issuing authority.
- present: Seattle police and the Seattle Police Department are repeatedly named as the investigating and issuing authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and investigating authority.
- present: "Seattle police officers" and the "Seattle Police Department" tip line identify the responding and issuing authority.
- present: "Seattle police officers" and "Seattle Police Department" repeatedly identify the responding and issuing authority.
- present: Seattle police officers and the Seattle Police Department are named repeatedly as the responding and issuing authority.
- present: "Seattle police officers" and "the Seattle Police Department" are named repeatedly as the responding and issuing authority.
- present: Seattle police officers and homicide detectives are named repeatedly as the responding and issuing authority.
- present: Seattle police, homicide detectives and the Seattle Police Department are repeatedly named as the responding and issuing authority.
- present: "Seattle police officers" and homicide detectives are named repeatedly as the responding and issuing authority.
- present: "Seattle police officers" and "homicide detectives" are named as the responding and investigating authority throughout the post.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and issuing authority.
- present: "Seattle police officers" and "Seattle Police Department" are named repeatedly as the investigating and issuing authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and investigating authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding authority.
- present: "Seattle police officers" and "Seattle Police Department" are named repeatedly as the responding and investigating authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and issuing authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and issuing authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and issuing authority.
- present: "Seattle police officers" and "homicide detectives" are named repeatedly as the responding and issuing authority.
Hazardpresent25/25
Final assessment
Present on a 25 of 25 vote. The threat is named outright as a "stabbing" that caused the "death of a King County Metro coach driver", later booked "for investigation of murder".
What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.
See all 25 individual reads
- present: The text names a "stabbing" and a "homicide" investigation, a specific violent threat.
- present: The hazard is explicit: a stabbing that killed a Metro coach driver, with a murder investigation.
- present: The threat is specific: a stabbing and the resulting death of a Metro coach driver, with a murder investigation.
- present: The text names a stabbing and the resulting death of a Metro coach driver, a specific violent threat.
- present: The text names a "stabbing" and a "death of a King County Metro coach driver", a specific violent threat.
- present: The threat is specific: a "stabbing" and a "death of a King County Metro coach driver" investigated as murder.
- present: It names a stabbing and a homicide of a Metro coach driver, a specific violent threat.
- present: It names a "stabbing" and the "death of a King County Metro coach driver", a specific violent threat.
- present: It names a "stabbing" and a "death of a King County Metro coach driver", booked for murder, a specific threat.
- present: The text names a "stabbing" and a "death of a King County Metro coach driver", a specific violent threat.
- present: The threat is explicit: a stabbing and the resulting death of a Metro coach driver, plus an armed suspect at large.
- present: It names a "stabbing" and a "death of a King County Metro coach driver", a specific violent threat.
- present: The text names a stabbing and the resulting death of a Metro coach driver, a specific violent threat.
- present: The text names a stabbing and the resulting death of a Metro coach driver, a specific violent threat.
- present: It names a "stabbing" and a "murder" investigation, a specific violent threat rather than a vague incident.
- present: It names a "stabbing" and the "stabbing death of a King County Metro Coach driver", a specific violent threat.
- present: It names a "stabbing" and "murder" of a Metro coach driver, a specific violent threat.
- present: The text names a "stabbing" and the "death of a King County Metro coach driver", a specific violent threat.
- present: It names a "stabbing" and the resulting "death of a King County Metro coach driver", a specific violent threat.
- present: The text names a "stabbing" and the resulting "death of a King County Metro coach driver", a specific violent threat.
- present: The threat is specific: a "stabbing" and later "murder" of a Metro coach driver by a named suspect.
- present: It names a "stabbing" and the "death of a King County Metro coach driver", a specific violent threat.
- present: The text names a "stabbing" and the "death of a King County Metro coach driver", a specific violent threat.
- present: The text names a "stabbing" and a "death of a King County Metro coach driver", a specific violent threat.
- present: The text names a "stabbing" and the "death of a King County Metro coach driver", a specific violent threat.
Locationpresent25/25
Final assessment
Present, unanimous at 25 of 25. Street level detail runs through the thread: "the 4100 block of University Way NE", "50th Avenue NE and NE 15th Street", and "16th Avenue NE and NE 41st Street".
Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.
See all 25 individual reads
- present: Places are given precisely, including "the 4100 block of University Way" and the University District.
- present: Places are given, including the 4100 block of University Way NE and the University District.
- present: Places are given, including the 4100 block of University Way NE and the University District.
- present: Places are given precisely, including "the 4100 block of University Way" and the University District.
- present: Places are given precisely: "4100 block of University Way NE" and the University District.
- present: Places are given, including "4100 block of University Way NE" and "50th Avenue NE and NE 15th Street".
- present: Places are given, including "the 4100 block of University Way" and the University District.
- present: Places are given, including the "University District" and the "4100 block of University Way".
- present: Places are named throughout: "4100 block of University Way", "3rd Avenue South and South Main Street".
- present: It places events in the "University District" and the "4100 block of University Way NE".
- present: Places are given, including the 4100 block of University Way NE and 3rd Avenue South and South Main Street.
- present: It places events in the "University District" and the "4100 block of University Way NE".
- present: Places are given precisely: "4100 block of University Way" and 3rd Avenue South and South Main Street.
- present: Places are given, including the University District and the 4100 block of University Way NE.
- present: Places are given precisely: "4100 block of University Way NE" and the University District.
- present: Places are precise: "4100 block of University Way", "50th Avenue NE and NE 15th Street", the University District.
- present: Places given include "4100 block of University Way" and the University District.
- present: Places are precise: "4100 block of University Way NE" and "the University District".
- present: Places are given precisely: "4100 block of University Way NE" and the University District.
- present: It gives street locations such as "the 4100 block of University Way NE" and the University District.
- present: Places are given, including "4100 block of University Way" and the "University District".
- present: Places are given: "University District", "3rd Avenue South and South Main Street", "4100 block of University Way".
- present: Places are given precisely, including "4100 block of University Way" and the University District.
- present: Places are given, including "4100 block of University Way" and the "University District".
- present: Places are given precisely: "4100 block of University Way NE" and "3rd Avenue South and South Main Street".
Guidancepresent25/25
Final assessment
Present, with 25 of 25 agreeing. Readers are told what to do: "Do not attempt to approach Sitzlack", "please call 911 immediately", and in the 3:49 a.m. update, "Avoid area".
The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.
See all 25 individual reads
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told not to approach the man and to call 911 immediately, plus avoid area earlier.
- present: Recipients are told: do not attempt to approach Sitzlack, and please call 911 immediately with information.
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately" with information.
- present: Readers are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack", "Avoid area", and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack", "call 911 immediately" and "Avoid area".
- present: Readers are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately" with information.
- present: Recipients are told "Do not attempt to approach Sitzlack" and "please call 911 immediately".
- present: Readers are told "Do not attempt to approach Sitzlack" and to "call 911 immediately" with information.
- present: Readers are told "Do not attempt to approach Sitzlack" and to "call 911 immediately" with information.
- present: Recipients are told "Do not attempt to approach" and to "call 911 immediately" with information.
- present: Readers are told "Do not attempt to approach Sitzlack", "call 911 immediately" and "Avoid area".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and "please call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Readers are told "Do not attempt to approach Sitzlack" and to "call 911 immediately", plus "Avoid area".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately" with information.
- present: Recipients are told "Do not attempt to approach Sitzlack" and "please call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach Sitzlack" and to "call 911 immediately".
- present: Recipients are told "Do not attempt to approach", "Avoid area" and to "call 911 immediately".
Timepresent25/25
Final assessment
Present on a 25 of 25 vote. Every entry is clock stamped, from "UPDATE 8:50 a.m. Dec. 21" down to "3:17 a.m.", and the arrest is fixed "at 4:51 a.m. today".
When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.
See all 25 individual reads
- present: Numerous clock and date stamps appear, such as "UPDATE 8:50 a.m. Dec. 21".
- present: Many clock times and dates appear, such as 8:50 a.m. Dec. 21 and 4:51 a.m.
- present: Clock times and dates are stamped throughout, such as UPDATE 8:50 a.m. Dec. 21 and arrested at 4:51 a.m.
- present: Clock times and dates run throughout, such as "UPDATE 8:50 a.m. Dec. 21" and the 4:51 a.m. arrest.
- present: Clock times and dates abound, such as "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Clock times and dates run throughout, such as "UPDATE 8:50 a.m. Dec. 21" and the arrest "at 4:51 a.m. today".
- present: Many clock times and dates appear, such as "UPDATE 8:50 a.m. Dec. 21".
- present: It carries many clock times and dates such as "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m.".
- present: Many clock times and dates appear, including "8:50 a.m. Dec. 21" and "3:17 a.m.".
- present: Many clock times and dates appear, including "8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Numerous clock times and dates appear, such as "8:50 a.m. Dec. 21" and the 4:51 a.m. arrest.
- present: Many clock stamps appear, including "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Clock times such as "8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today" anchor recency.
- present: Multiple clock times and dates appear, such as "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Many clock stamps appear, such as "UPDATE 8:50 a.m. Dec. 21" and an arrest "at 4:51 a.m. today".
- present: Many clock stamps appear, including "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Many clock stamps and dates appear, such as "UPDATE 8:50 a.m. Dec. 21".
- present: Many clock times and dates appear, including "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Clock times and dates abound, including "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Many clock and date stamps appear, including "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Many clock times and dates appear, such as "8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Clock times and dates abound, including "8:50 a.m. Dec. 21" and "arrested at 4:51 a.m. today".
- present: Multiple clock stamps appear, such as "UPDATE 8:50 a.m. Dec. 21" and the 4:51 a.m. arrest.
- present: Numerous clock times and dates appear, such as "UPDATE 8:50 a.m. Dec. 21".
- present: Numerous clock times and dates appear, such as "UPDATE 8:50 a.m. Dec. 21" and "arrested at 4:51 a.m.".
Impactpresent25/25
Final assessment
Present, unanimous at 25 of 25. The line "he is considered armed and dangerous" states the harm the suspect could still do, on top of a stabbing that already killed the driver.
What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.
See all 25 individual reads
- present: It says the suspect is "considered armed and dangerous" and describes a driver's death, conveying lethal severity.
- present: It warns he is considered armed and dangerous, conveying serious potential harm to anyone who approaches.
- present: It says the suspect is considered armed and dangerous, and a driver was killed, conveying lethal severity.
- present: The suspect is "considered armed and dangerous" and the stabbing already caused a death, conveying lethal severity.
- present: The suspect is called "armed and dangerous" and a driver was killed, conveying lethal consequence.
- present: It states the suspect "is considered armed and dangerous", an explicit statement of danger to the public.
- present: The suspect is "considered armed and dangerous" and the driver died, both stating serious harm.
- present: The suspect is called "armed and dangerous" and a death is reported, stating clear severity.
- present: It warns he "is considered armed and dangerous", an explicit statement of the danger posed.
- present: Calling the suspect "armed and dangerous" after a fatal stabbing states the potential harm plainly.
- present: It says the suspect "is considered armed and dangerous" and reports a death, conveying lethal potential.
- present: It warns the suspect "is considered armed and dangerous" and reports a driver was killed, conveying lethal severity.
- present: It says the suspect "is considered armed and dangerous" and describes a killing, stating clear potential harm.
- present: It says the suspect is "considered armed and dangerous" and describes a fatal stabbing, conveying lethal severity.
- present: The suspect is called "armed and dangerous", an explicit statement of the harm he could cause.
- present: The phrase "considered armed and dangerous", plus a driver killed, conveys severe potential harm.
- present: It warns the suspect "is considered armed and dangerous", an explicit severity statement.
- present: It says the suspect "is considered armed and dangerous" and describes a death, conveying lethal severity.
- present: It warns the man "is considered armed and dangerous" and reports a fatal stabbing, stating severity.
- present: The suspect "is considered armed and dangerous" and a driver was killed, conveying lethal severity.
- present: It warns the suspect "is considered armed and dangerous", an explicit statement of danger to people.
- present: It states the suspect "is considered armed and dangerous" and reports a death, conveying lethal consequence.
- present: The suspect is called "armed and dangerous" and a driver was killed, an explicit statement of severity.
- present: The suspect is called "armed and dangerous", an explicit statement of the harm he could cause.
- present: The phrase "he is considered armed and dangerous" states the danger the suspect poses to people.
Coded by Claude Opus 5
Systematic AI judgments with visible reasoning, not human-validated codings.
Background
Key Findings
Sources
Every claim on this page is meant to be checkable. Open the links below (and the Verify this quote control under each confirmed alert) to read the original university, news, or archive page yourself. Hostnames are shown so you can see where you are going; archived copies survive when live pages move or disappear. See also our methodology.
- Official
Campus Alert Archive. "University of Washington: Community safety notice 6 for reported incident — incident." Incident of December 18, 2024. Added July 2026; last updated August 2026. https://campusalertarchive.com/case/university-of-washington-uw-alert-13-2024-12-18/
Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.