Search For Missing Autistic Boy Who Looked Up 'Ways To Hide' Continues By Suneeta Sunny Representational image Authorities in Nebraska continue to search for a missing 11-year-old autistic boy who walked out of his elementary school last week. Police are seeking the public's help to locate Ryan Larsen of La Vista who has been missing since he left his school on May 17. A missing alert has already been issued for Larsen who is described as a white male child with brown hair and hazel eyes. He is 5 feet 8 inches tall and weighs 125 pounds. He has been without medication for seizure since he disappeared.