Gianni Belvedere was 24 and living in San Diego when he went missing after failing to pick up his fiancée, Ilona Flint, from Westfield Mission Valley on December 23, 2013. Flint and Gianni’s younger brother Salvatore waited in the mall parking lot; shortly after 1:15 a.m. on December 24 Flint called 911 after she and Salvatore were shot. Flint was found dead at the scene from a gunshot wound to the head. Salvatore was critically injured and died three days later.

Gianni’s body was not located until January 17, 2014, when a passerby reported a foul odor coming from a dark green Toyota Camry at a Riverside shopping center. Police found Gianni decomposing in the car’s trunk; an autopsy determined he had died of a gunshot wound to the head around the same time as Flint and Salvatore.

Investigators arrested Carlo Mercado in June 2014 after weapons, silencers and an assault rifle were found in his vehicle and ballistic testing linked one gun to the three killings; Mercado’s DNA was also found on an air freshener in the trunk of Gianni’s car. Authorities said the victims were not known to Mercado and that the killings appeared to be a random act of violence rather than a personal dispute. Anyone with memories of the victims or information about the case is asked to come forward.