Lawrence Richardson was 21 when he was fatally shot in San Francisco on April 2, 2012. His death occurred during a year when the city experienced a noticeable rise in homicides, and it remains one of the unsolved killings from that period.

Authorities say the case is still under investigation and the San Francisco Police Department continues to seek public assistance. The Mayor’s Office and community leaders have at times offered monetary rewards for tips that lead to arrests and successful prosecutions, citing a shortage of witnesses or critical evidence as factors that have hampered resolution of many cases from 2012.

Anyone with information about Richardson’s death is asked to contact the San Francisco Police Department; tips that could help bring justice for him are still being sought.