Family of 25-year-old killed in Saturday shooting 'in shock' over unsolved homicide By Daniel Montes article Robert Gash, 25, was killed Saturday May 8, 2021 in an unsolved shooting near Polk and Fern streets in San Francisco (photos courtesy of Tanya Mena). SAN FRANCISCO - The mother of a man killed over the weekend in a shooting in San Francisco's Polk Gulch neighborhood said on Tuesday her entire family has been devastated by her son's murder. According to police, 25-year-old Robert Gash was killed in a shooting that happened around 1:40 a.m. Saturday on Fern Street, between Polk Street and Van Ness Avenue.