San Francisco, Feb.20 --- Holding signs of "Justice for all", "No Scapegoat" and others, over 2,000 protesters marched on streets in San Francisco Saturday morning to ask for justice for a Chinese-American police officer Peter Liang, who was convicted by a New York jury on Feb. 11 of manslaughter in the 2014 shooting death of an unarmed man, Akai Gurley, 28, in a darkened Brooklyn public-housing stairwell. 

San Francisco is among other over 40 cities in the United States to support Liang. Although Liang testified that the shooting was an accident, he could face up to 15 years in prison when he's sentenced April 14. Many of his supporters say they believe Liang is a scapegoat because of anger over other police shootings.