Police sources said the pair had some sort of confrontation before the alleged stabbing.
But here's the most interesting Is this coincidence of a bad assumption, or did they know more?
His death led to an outcry from tech leaders including Elon Musk who linked it to fears of a rising drugs and crime crisis in San Francisco, a known tech hub.
Mr Musk tweeted: "Many people I know have been severely assaulted.
But here's the most interesting Is this coincidence of a bad assumption, or did they know more?
https://www.mirror.co.uk/news/us-news/breaking-san-francisco-cops-arrest-29674289.amp