Anyone who thinks SF isn't tough enough on violent crime, listen up: Silas Byers, 44, was convicted of first-degree murder on Tuesday in San Francisco court for the June 2009 slaying of Douglas Johnson.

The conviction came down despite the fact that one piece of evidence was a fingerprint on a bag of weed, which Byers was seen handing the victim through a window of a parked car, right before stabbing him in the chest. Johnson, the victim, was seated in the passenger seat and two friends were in the car with him at the time, completely drunk and high on various substances.

One male witness, who told jurors the defendant was "a cowardly motherfucker," admitted that he was completely fucked up at the time of the murder.