Oklahoma authorities are searching for 17-year-old Tristin Harris, who is believed to be suicidal and was last seen driving through Kansas on his way to Arkansas. The Oklahoma Highway Patrol issued an Endangered Missing Advisory on behalf of the Canadian County Sheriff's Department, warning that Harris may be in imminent danger.
According to News 9, Harris was last seen wearing a gray shirt, dark wash blue jeans, boots, and aviator sunglasses. He is described as 5 feet 10 inches tall, weighing around 130 pounds, with brown hair and brown eyes. He is believed to be traveling in a gray 2013 Ford F-150 FX4 bearing Oklahoma license plate TJX866.
The Endangered Missing Advisory is a distinct tool from Oklahoma's better-known AMBER Alert system. Per Oklahoma.gov, the state reserves AMBER Alerts for cases with evidence of a third-party abduction, while an Endangered Missing Advisory covers minors 17 or younger whom law enforcement believes face imminent personal danger, including a mental health or self-harm crisis, even without any sign of abduction.
A Search Stretching Across State Lines
Harris's last known location placed him somewhere in Kansas as of Sunday, en route to Arkansas, the same report notes, a detail that has widened the search well beyond Oklahoma's borders. That geographic spread points to why cases like his often require coordination between multiple state agencies rather than a single local search effort.
Oklahoma law requires that coordination to move quickly. Under Title 74 § 150.12A, local police and sheriff's departments must immediately notify the Oklahoma State Bureau of Investigation and enter a missing person's details into the FBI's National Crime Information Center database once a report comes in, according to Justia Law. That NCIC entry is what allows officers in Kansas or Arkansas to recognize Harris's truck and license plate during a routine stop, even outside Oklahoma's jurisdiction.
The Canadian County Sheriff's Office, which is coordinating the search alongside the Oklahoma Highway Patrol, is headquartered in El Reno and patrols nearly 900 square miles across central Oklahoma, serving an estimated population of 189,490 residents. The county sits directly west of Oklahoma City along Interstate 40, and it was recently identified as the state's fastest-growing county and the 35th fastest-growing in the country, a boom that has brought heavier commuter and interstate traffic to the roadways connecting Oklahoma, Kansas, and Arkansas.
Statewide Reliance on the 988 Crisis Line
Anyone experiencing thoughts of self-harm or suicide is urged to call 988 for mental health help, and anyone who spots Harris is asked to call 911 immediately, per News 9's report. That guidance reflects a rapidly growing reliance on Oklahoma's crisis line: the state's 988 Mental Health Lifeline fielded more than 178,000 crisis contacts in its first three years of operation through July 2025, resolving roughly 87 percent of those situations over the phone without needing emergency medical or law enforcement response, according to the Oklahoma Department of Mental Health and Substance Abuse Services.
That growth has been especially steep in Oklahoma. Between July 2022 and July 2024, the state recorded a 185 percent increase in monthly 988 call volume, the highest percentage growth of any state following the national rollout of the three-digit line, per the Georgetown University Center for Children and Families. Nationally, 988 contact volume rose by an average of 95 percent across all states over the same period, roughly half Oklahoma's rate.
How Oklahoma Tracks Missing Youth Over Time
Harris's case joins a substantial backlog of open files in the state. Oklahoma maintains more than 1,100 open missing persons cases statewide, with juveniles accounting for approximately 80 percent of those reported missing, according to data from the Oklahoma State Bureau of Investigation's Missing Persons Clearinghouse.
If a missing person is not located quickly, Oklahoma law adds another layer of tracking. Under the state's Francine's Law, agencies are statutorily required to enter missing person cases and available biometric or medical records into the National Missing and Unidentified Persons System within 30 days if the individual remains unaccounted for, Justia Law reports. The law was named for Francine Frost, who vanished from Tulsa in 1981 and went unidentified for more than three decades. Conversely, once someone is found, investigators must notify the OSBI and clear the NCIC entry within 72 hours, a step meant to prevent unnecessary multi-state vehicle stops once a case is resolved.
No additional details about Harris's condition or whereabouts have been released beyond the description circulated in the advisory. Anyone who sees Tristin Harris or his gray Ford F-150 is urged to call 911.
