Commerce City police say a man shot his stepdaughter to death during an argument before killing himself.
The Denver Post reports (http://goo.gl/dJqqHo ) 62-year-old Luis Lara shot and killed 43-year-old Monica Montoya on Saturday afternoon before turning the gun on himself. Cmdr. Matt Rippy says the man's 73-year-old wife received minor injuries.
Investigators say the argument began between Lara and his wife, and ended with the shooting when Montoya showed up at the home, which escalated the conflict.
Lara's wife has non-life-threatening injuries.
Sgt. Tim McGuire says police had investigated two prior disturbances at the address. No arrests were made during the earlier calls.