SAN FRANCISCO (BCN)—San Francisco police today announced a $250,000 reward for information in a 2015 Hayes Valley shooting that left four young men dead.

Police have arrested one suspect, 27-year-old Lee Farley, in the Jan. 9, 2015 quadruple homicide but say they are now asking the public for help in identifying and locating additional suspects.

A $250,000 reward is being offered for information leading to arrests and convictions.

San Francisco residents Yalani Chinyamurindi, 19, Harith Atchan, 21, Manuel O’Neal, 22, and Antioch resident David Saucier, 20, were shot multiple times while they sat in a vehicle in the 300 block of Laguna Street around 10 p.m., according to police.

All four died at the scene.

Farley’s arrest in July was the first break in the case, which shook the neighborhood.

A felon with a prior history of arrests and convictions on charges including burglary, firearms, shootings, assault and drug trafficking, Farley was already in federal custody on an unrelated weapons charges at the time of his arrest last week.

Farley has pleaded not guilty to charges including murder, shooting at an inhabited vehicle, possession of a firearm by a convicted narcotics offender and participation in a criminal street gang. He remains in custody with bail set at $20 million.

His next court date is Oct. 4.

Anyone with information on this case is asked to call homicide detectives at (415) 553-1145 or the Anonymous Tip Line at (415) 575-4444 or to Text a Tip to TIP411 and begin the text with SFPD.