Julio Peraza, 21, was shot and killed at the Twin Peaks lookout in San Francisco on February 14, 2016, around 2 a.m. The shooting also killed 19-year-old Rene Mora and left an 18-year-old man with life-threatening injuries. The group of victims had been at the popular scenic spot when the attack occurred.

Authorities arrested 26-year-old Richard Contreras shortly after the incident. He was charged with murder, attempted murder, carjacking and being a felon in possession of a firearm. Contreras reportedly arrived at the lookout with two women, encountered the victims and a confrontation followed in which he allegedly opened fire.

At trial the defense said Contreras had been assaulted and robbed five days earlier, was carrying a gun for protection and felt threatened that night, claiming self-defense. The jury deadlocked on the murder and attempted murder counts; Contreras was convicted of carjacking at gunpoint, possession of a firearm by a felon and unlawfully taking a vehicle. The victims’ families said they had never known Contreras and remain seeking answers.

If anyone was at Twin Peaks that night or has information about what led to the confrontation, please share what is known.