Andre Helton was an 18-year-old African-American man from San Francisco who was found shot to death on the morning of August 14, 2008. A bystander had called police about men appearing to sleep inside a champagne-colored Mazda 626 parked on Golden Gate Avenue, just outside the University of San Francisco campus. Officers arrived around 5:20 a.m. and discovered Helton and a second victim, 34-year-old Isiah Turner, both fatally shot. University officials said there was no indication either victim was connected to the school.

Investigators later linked the killings to a violent street gang from the Western Addition known as the Central Divisadero Players, or CDP. Federal authorities brought a racketeering indictment in August 2014 that named suspects in the double homicide and described the gang’s involvement in murders, assaults, extortion, drug trafficking, and pimping. Reports from the investigation also noted a separate murder of Andre’s brother, Jelvon Helton, tied to the same gang.

What information can anyone add about Andre’s last known movements or who might have seen the Mazda on Golden Gate Avenue that morning?