Bogota - A handyman, known as "Goofy", has confessed to raping, torturing and then beheading 140 children in a five-year orgy of bloodshed in Colombia's biggest ever serial murder case, authorities said yesterday. The mutilated corpses of the mostly male victims aged between eight and 16 years old have been discovered near more than 60 towns in at least 11 of Colombia's 32 provinces, the chief prosecutor, Mr Alfonso Gomez, said.