ROWLAND HEIGHTS, Calif. (KABC) -- A shooting in Rowland Heights left four people dead, including a gunman, on New Year's Eve, and the Los Angeles County Sheriff's Department said the man who helped stop the gunman is now in custody for murder.The Los Angeles County Sheriff's Department said the shooting happened in the 2200 block of Batson Avenue at about 8:40 p.m.Sheriff's officials said there were four gunshot victims at the scene when authorities arrived.The victims were described as a 27-year-old man, a 48-year-old woman, a 54-year-old woman and a 54-year-old man.All were pronounced dead at the scene.According to witnesses, the 54-year-old man took a handgun and shot the other victims.The suspect's 33-year-old son, identified as Christopher Morey, was able to wrestle the gun away from his father and shot him once, killing him.All but one of the victims was staying at the residence where the shooting occurred.Investigators said it was unknown why the 54-year-old suspect shot the victims. The investigation remained ongoing.Morey was arrested for the murder of his father.He was booked and held in lieu of $1 million bail.Anyone with information about this incident is encouraged to contact the Los Angeles County Sheriff's Department's Homicide Bureau at (323) 890-5500.