No description of the perp, even though the article suggests that there were plenty of witnesses.
Sadly, this is par for the course in this community. A modest proposal to increase involvement by the perp's neighbors:
The San Francisco Vigilance Movement has traditionally been portrayed as a positive response to government corruption and rampant crime ... In 1871, at least 18 Chinese-Americans were eventually killed by the mob rampaging through Old Chinatown, after a white businessman was inadvertently caught in the crossfire of a tong battle.