A suspected mugger in the Boyle Heights area of Los Angeles made a slight mistake when he tried to return a wallet, police said. The one he threw back at the victim was his own--complete with photograph and home address. Los Angeles police officers went to the home and arrested Raul Carrillo, 25. Hollenbeck Division Detective John Munguia said the unidentified victim was robbed at knifepoint by two men while walking home from work at a tortilla factory with $110. The robbers reappeared a short while later and one of them threw the supposedly empty wallet at him.