Was He Wrong?

Recently, controversy has arose within the Seattle city limits. An officer, firstly, arrested a female wrongly then continued on to punched her cousin in the face with no remorse. Many people are weighing in on this situation and saying that he was out of line, twice: he should be arrested himself. However Seattle's Police Dept. only gives this officer "extra training". Do you think he was out of line? Was his punishment unjust? What should his punishment have been?