Guillermo Hernandez, 28, was shot and killed during a party in Encino, Los Angeles, on May 13, 2018. The gathering began Saturday night and ran into the early hours of Sunday morning. An argument outside the house escalated into a violent altercation; Hernandez and a 69-year-old homeowner were standing near the street when shots were fired. Hernandez was struck by a single gunshot to the head and was pronounced dead at the scene by paramedics at about 4:30 a.m. The older man was severely injured and taken to a hospital in critical condition.

LAPD investigators recovered video footage of the confrontation showing a heated argument outside the party, but the footage did not make clear who was directly involved in the fight. Witnesses reported hearing gunfire and seeing Hernandez lying by a curb. On May 16, 2018, police arrested 23-year-old Cesar Lozano of Reseda on suspicion of murder; he was identified as the person who fired the shots. Hernandez’s family said he worked as a caterer on movie sets and was not involved in gangs.

Did anyone at the party or in the neighborhood see more of the altercation or the moments before the shooting?