(WARNING: Surveillance video is graphic)
Prosecutors believe 23-year-old Christopher Porter-Bailey kicked the victim in the head during a robbery, rendering the victim unconscious. And that was after police say a group of four or five robbers took her purse then knocked her to the ground.
The attack happened on June 30 along Market Street during the city's Pride weekend celebrations.
Two other people have also been arrested in the case.
Porter-Bailey is currently on probation from a grand theft charge in Alameda County back in April.