PORTLAND, Ore. (CBS/KOIN/AP) Portland police say they will not give up in their search for missing 7-year-old Kyron Horman, who disappeared June 4.
"This will not become a cold case for us," Multnomah County Sheriff's Capt. Jason Gates said. "We will continue to investigate this case until we have it solved."
Police overseeing one of the largest search-and-rescue operations in state history, now entering day 11, said Monday that the missing 7-year-old Portland boy likely didn't simply walk away from school.
Kyron went missing June 4 after a science fair at his elementary school.
The teams searching for Kyron had included more than 1,500 volunteers from across the state, as well as from southern Washington state and northern California, according to KOIN, but most of those teams were sent home Sunday. A more limited search team from Multnomah County will canvass Skyline Elementary School again this week.
"It's not a search-and-rescue operation anymore," Gates said in a press conference.
He added that parents in the area need not take extra precautions with their children. Authorities have said since the earliest days of the investigation that they believe Kyron's disappearance was an isolated case.
"There is no reason to believe that the kids are in any danger here," Gates said.
Kyron's family, including his mother, stepmother, stepfather and father, have made two public appearances. In the first one, on Friday, they pleaded for Kyron's return, but would not take questions. They attended a press conference on Sunday, but did not release a statement.
Capt. Monte Reiser of the sheriff's office has said that authorities can charge a suspect without finding Kyron.
The sheriff's office has offered a $25,000 reward for information that leads to the boy.
Anyone with information on the whereabouts of Kyron Horman is asked to call the Multnomah County Sheriff's tip line at 503-261-2847.