SAN FRANCISCO—The San Francisco Police Department Homicide Investigators are asking for the public’s assistance in locating the suspect involved in the deadly beating of elderly North Beach sketch artist Stuart Jackson.

On December 5, 2015, at approximately 2:00 p.m., Jackson was standing at a bus stop on the corner of Van Ness Avenue and Market Streets “when the suspect approached him and without provocation began to assault the 74-year-old victim,” according to a press release from the SFPD.

During the assault, the victim fell and struck his head on the cement. “He was hit so hard that it crushed his skull, and some of the bone penetrated into his brain,” Stuart’s brother Bob Jackson exclusively told Hoodline.

Jackson was taken to the hospital where he later died of his injuries, police stated. He was a noted regular at North Beach haunts like Caffee Trieste, Stella Pastry and Vesuvio, Hoodline reported in December.

The suspect is described by authorities as male, black, mixed race or Hispanic, 25-35 years old, standing 6 foot tall with “a muscular build and clean” as seen by the video released by SFPD.

Anyone with information on this crime is asked to contact the Anonymous Tip Line at (415) 575-4444, or Text-a-Tip to TIP411 and begin the text message with SFPD.