The father of missing Utah mom Susan Powell launched his own search this week after police said the case is at a standstill because they've run out of tips.
Susan's father Chuck Cox announced on the website for the nonprofit Susan Cox Powell Foundation that he was starting a search Tuesday on a 400-mile stretch of Interstate 84 from Pendleton, Ore. to Tremonton in northern Utah.
Susan Powell disappeared in 2009 and has never been found. Her husband, Josh Powell, killed their two sons and himself in February 2012. His brother Michael Powell, who was suspected of helping get rid of Susan Powell's body, killed himself a year later.
Police say Michael Powell's car was left at an Oregon junkyard weeks after Susan's disappearance. Authorities spent two days earlier this month searching an Oregon property for her remains.
Cox is traveling with a private investigator, handing out fliers and speaking to local law enforcement and residents to see if they remember anything that might produce new leads.
The Associated Press