Spokane Police Arrest Man in 1986 Cold Case Homicide
Authorities apprehended a 74-year-old suspect following a genetic genealogy investigation into a 1986 murder.
Updated on Oct. 22, 2026 in Sex Crimes
Spokane police arrested 74-year-old David J. Tibbett on suspicion of second-degree murder in connection to the death of 32-year-old Mary Ann Turner. Turner was found deceased in an East Central Spokane alley in 1986.
Why it matters
The arrest marks a significant development in a nearly 40-year-old cold case investigation that had previously remained unsolved. Detectives utilized advanced forensic genetic genealogy to identify a suspect in the long-standing homicide.
David J. Tibbett was booked into the Spokane County Jail at 2:30 p.m. on Wednesday following his arrest. The investigation remains active as authorities process evidence related to the 1986 incident.
The players
David J. Tibbett
He is a 74-year-old suspect currently in custody on suspicion of second-degree murder.
Mary Ann Turner
She was a 32-year-old victim whose death led to a nearly four-decade-long cold case investigation.
Othram
This company provides specialized forensic genetic genealogy services used by law enforcement to identify suspects.
Spokane Police
The local agency is responsible for the ongoing investigation into the 1986 homicide case.
The details
Investigators used DNA evidence and historical witness statements to link Tibbett to the scene where Turner was found with her scarf and sweater wrapped around her neck. Witnesses had reported seeing Turner enter a 1970s Ford Torino hours before she was discovered.
Timeline
Nov. 4, 1986: Mary Ann Turner was found deceased in a Spokane alley.
Oct. 21, 2026: Police arrested David J. Tibbett.
Legal Context
This arrest reflects the growing trend of utilizing forensic genetic genealogy to resolve cold cases that have sat dormant for decades. It aligns with broader nationwide efforts by law enforcement agencies to apply modern DNA technology to legacy crimes.
The resolution of this long-standing case provides potential answers to residents regarding a historic crime in East Central Spokane. Public safety and investigative procedures continue to be monitored as the legal process moves forward.
The takeaway
This case demonstrates how advancements in forensic science can provide closure for families years after a crime occurs. Communities may see more historic cases reopened as technological capabilities continue to evolve.
Further reading
For more information on local investigations, visit the Spokane Sex Crimes section.
