SAN FRANCISCO (CBS SF) — Twitch founder Justin Kan was the apparent victim of a hate crime when a man was caught on surveillance camera footage tagging a racist slur on the garage door of his San Francisco home.

Kan, who last year sold his company Twitch to Amazon for nearly $1 billion, posted pictures of the slur, and video of the suspect taken from his home surveillance camera on Facebook.

In the video, a bearded man wearing a gray hooded sweatshirt can be seen pulling a marker out, and scribbling the anti-Asian slur on Kan’s garage door before fleeing on his bicycle.

“Obviously, it was a pretty offensive act. Something I would never have expected in San Francisco, so now I’m mostly angry about it,” Kan said.  “Nothing like this has ever happened before. it’s pretty shocking to wake up to.”

Kan is the son of Chinese immigrants.

San Francisco Police have categorized the vandalism as a hate crime, and the Special Victims Unit is investigating.