A pickup truck association with a missing teenager from Aloha was found Monday morning near Washington Park in Portland.
A member of the public saw the white pickup and reported it.
A backpack belonging to Annieka Vaughn was found inside of the truck. Police searched the area, but didn't find Vaughn of Zachary Peterson.
Peterson, who's 23-years-old, is accused of sexually assaulting Vaughn, who's 15-years-old.
Detectives believe Annieka is likely with 23-year-old Petersen. She went missing October 30.
Petersen also went missing on October 30, which was reported to the Pasco Police Department. Prior to disappearing, Petersen called the crisis line in Washington. He is believed to be suicidal and possibly in possession of a firearm.
Annieka is described as 5'9" tall, 150 pounds, with brown shoulder length hair and brown eyes. Petersen is described as 5'10" tall, 150 pounds, with buzzed brown hair and brown eyes.
Detectives believe Peterson is possibly traveling to Seaside, OR or Sacramento, CA.
Anyone with information on the whereabouts of Mr. Petersen or Annieka is asked to call non-emergency dispatch at (503) 629-0111.
Photo below: Annieka Vaughn
Photo: Zachary Peterson