Go view the tape and then come back and say that the cop was hustling this a$$hole who had been reported to have been hitting his daughter, displayed signs of drinking and had 'parked' his car via a four-wheel slide on the side of the road at an angle.
He was not reported to have been hitting his daughter. His daughter was hitting him. Try to get your facts right before you spew off calling people names.
Being an a$$hole is not a crime. Drinking is not a crime unless he was driving; and apparently he wasn't. Unless the cop had probable cause to believe the guy had committed a felony, he had no legal authority to arrest the guy. A cop cannot arrest a guy for a misdemeanor unless he personally witnessed the crime.