San Francisco Police are looking for a man they say killed a puppy in a violent attack.Surveillance video shows the man grabbing a four-month old Cocker Spaniel "Prince" and slamming the puppy into the floor, killing him.Police say the man threw canned goods at the woman and then grabbed her puppy from the arms of another person and forcefully slammed it into the floor. Officers transported the victim and puppy to San Francisco Animal Care and Control for treatment. Unfortunately, Prince did not survive his injuries.The suspect, Delos Pierre Gallon, 23, of San Francisco, is wanted on domestic violence, kidnapping and felony animal cruelty charges. He has a prior arrest for firearms violations and should be considered dangerous.