Comment: You also want the cop to be

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In reply to comment: You're right, he shouldn't (see in situ)

You also want the cop to be

You also want the cop to be the bad guy. You accuse him of getting a running start to propel a girl's head into the wall as if his intent was to build speed in order to make his shove more dangerous. I really don't believe his intent was to shove the girl when he began to run. I also don't believe his intent was to 'propel her head into a wall'. I think it happened this way because the girl messed up. First, she attacked another lady. Then, she tried to escape the police. The police did not mess up by forcibly stopping her.