Police are looking for the person responsible for the death of Stephen Martin during last month's Bay to Breakers race. If you recall, during the race on Kezar Dr., near Sharon Meadow in Golden Gate Park, Martin was sucker punched by someone, causing him to fall onto a curb and hit his head. Martin's family took him off life support this past weekend. And now police need to know who is responsible.

According to reports, Martin was "arguing with a group of men in 49ers jerseys" prior to the attack. Said group has been described as "Latino men in their 20s wearing red and white 49ers " who were with a "group of women wearing purple" with one of those women wearing a tutu. Police say that evidence could be on a group member's or bystander's phone.

Martin was wearing a green troll doll wig during the race. Anyone with information should call the SF Police department at 415-575-4444 or text information to TIP411.