King County Sheriff’s Office deputies are asking the public to help locate a missing 13-year-old who was last seen early Tuesday, Dec. 23 at home in SeaTac, according to a missing person bulletin from the office’s Criminal Investigations Division.
The bulletin identifies the missing juvenile as Jonatan W. Biyembika.
The King County Sheriff’s Office said he is autistic, nonverbal and communicates through writing.
Deputies said Jonatan was last seen at about 3 a.m. Tuesday, Dec. 23, 2025, at home in SeaTac.
He was last seen wearing red pants and a black T shirt and may be wearing a white puffer jacket, the bulletin said.
The sheriff’s office said Jonatan likes to go to random schools and restaurants and is familiar with riding Metro buses.
Deputies said he has gone as far as Bellevue while trying to get to school.
Jonatan is described as 13-years-old with brown hair and black eyes.
The bulletin lists his height as 5 feet 9 inches and weight as 100 pounds.
The King County Sheriff’s Office urged anyone who sees Jonatan or has information about his whereabouts to contact emergency services.
“Please call 9 1 1 if you contact Jonatan or have any information on this case,” the bulletin said.
