Robert Dewey Hoskins was taken into custody in Long Beach, where authorities said he may have fled after his escape from the Metropolitan State Hospital in Norwalk, about eight miles away, police said.
He had been committed there last year and was returned to the facility after his arrest. Police didn't comment about how Hoskins escaped or where he had been over the past week.
A message left with a spokeswoman for the California Department of Mental Health was not immediately returned.
Police asked for the public's help Thursday in locating Hoskins. They said he is 'highly psychotic' and can be extremely violent but didn't elaborate.
After his release from prison, Hoskins completed a stay at Atascadero State Hospital, where he was determined to be mentally disturbed, police said. He was convicted of vandalism in July 2011 and was eventually placed in the Norwalk facility.
From Associated Press Via Yahoo! News