. >> reporter: san francisco police said woods was suspected in a stabbing that he had what hayappeared to be a six to eight-inch knife. videos posted to social media show how it escalated as officers moved closer. the police chief says they used a number of tactics. >> the officers you can hear them yelling over and over again, drop the knife. they had enough time to get the bean bag gun there and deploy it as many times as they did. i really don't know how much more you can make it plain to a wanted felon who had just stabbed somebody that we needed him to drop the knife. >> reporter: he looks like he takes steps then an officer moves toward his path. the camera jerks away as shots ring out. other videos posted online show a reverse angle. >> well, i've already spoken to the chief and there will be a thorough and transparent investigation. >> i thought it was shocking. >> reporter: records show that woods has prior convictions. public defender jeff adochi says the past isn't relevant, the key is the danger posed at the time. >> there's no indication he's lunging at the officers or try