Editor's note: The above video about Tyrone Sero's death previously aired on KING 5 on Oct. 22, 2021.
PORT ORCHARD, Wash. -- A third suspect has been arrested in connection to the murder of a missing 19-year-old in Port Orchard.
The Kitsap County Sheriff’s Office (KCSO) said an 18-year-old man called authorities Friday morning to turn himself in. He was taken into custody without incident by Pierce County Sheriff’s Office deputies around 3:30 a.m. and turned over to the KCSO.
KING 5 has removed the 18-year-old man’s name from this story since he has not been formally charged.
Two others have been arrested, including a 19-year-old from Gig Harbor, who admitted to killing Sero, and a 20-year-old South Kitsap man who was arrested for first-degree murder in connection to the investigation.
On Oct. 19, Sero told a friend that the 19-year-old suspect contacted him on Snapchat asking to buy marijuana, according to probable cause documents.
The pair eventually agreed to meet at the Kitsap Community Resource building in Port Orchard. Sero arrived in a car with a different friend, and the 19-year-old suspect got there in a silver Toyota 4Runner with at least one other friend, according to probable cause documents.
Sero was last seen on surveillance video getting into an SUV the morning of Oct. 20.
Detectives began investigating Sero’s disappearance after a missing person’s report was filed with the Port Orchard Police Department on Oct. 20, which alerted the sheriff's office. Sero was entered into national and statewide databases as a missing person, according to the sheriff’s office.
The KCSO said human remains were found in relation to the investigation. The remains were turned over to the Kitsap County Coroner's Office to be identified.
If anyone has information about the case, contact Detective Dave Meyer at DMeyer@co.kitsap.wa.us or (360) 337-5617 or Detective Joe Hedstrom at JHedstro@co.kitsap.wa.us or (360) 337-5615. People can also submit anonymous tips at crimestoppers.com.