Police in Los Angeles have arrested four suspects in the murder of former ‘General Hospital’ actor Johnny Wactor, who was shot and killed earlier this year when he caught suspected gang members trying to steal his car’s catalytic converter. A statement from the Los Angeles Police Department said homicide detectives executed search warrants at several locations throughout the city on early Thursday morning, resulting in four people being arrested. Three of the suspects – 18-year-old Robert Barceleau, 18-year-old Leonel Gutierrez and 18-year-old Sergio Estrada – were arrested on a warrant for mu…