Brazilian policeman beats violent son in bar

A Brazilian policeman intervenes after an elderly woman calls claiming to have been hit by her son. The officer found him in a bar, approached him and hit him repeatedly until he fell over. He then warns him that if he attacks his mother again, he'll go straight to prison. The scene shows no formal arrest, just this forceful warning. The case raises the question of the appropriate reaction: to punish immediately or to follow standard procedure.