When Kay tries to shoot Rookie Anderson in Dredd (2012), the gun self-destroys, because Judge guns are coded to their DNA. This fact should be well-known to Ma-Ma's clan, and Kay did mention earlier specifically that he had seen many Judges, and Anderson didn't have what it takes to be one.
Anderson doesn't appear to be using her psychic powers at that point, and it seems that her psychic powers don't include making subjects perform actions against their will, or she could've made Kay release her, shoot himself, stand in a corner etc.