Oscar Rodas stood quietly during his arraignment at the Vista Courthouse Tuesday as his lawyer entered a plea of not guilty on his behalf.
The 27-year-old Fallbrook man is accused of murder and discharging a firearm causing bodily harm during the Nov. 1 killing of his former girlfriend Yesenia Becerril.
Becerril, 20, was found suffering from multiple gunshot wounds on South Vine Street near South Main Avenue in Fallbrook.
Witnesses told NBC 7 after Becerril was shot, she tried to run for help at a nearby 7-Eleven and was shot again.
Becerril's family said the victim dated Rodas for six years and the relationship was toxic.
A recent breakup in the days leading up to the killing may have prompted the shooting, family members said.
Rodas has a criminal history. He was convicted in 2012 for a gang-related offense and was on probation for a 2015 incident where he resisted an officer with force.
He is being held without bail. His next court date is Dec. 3. If convicted of both charges, he faces 15 years to life in prison.