5 minutes is way too short a time to do it right.
5 years installing and removing splinters under the nails and smacking his jewels just soft enough as to not cause serious injury. Filling his eyes with salt crystals might begin to approach justice.
But then again he probaby was not treated nice as a kid or his sister was mean to him. There is probably some valid reason that a smart lawyer can justify his actions with.
Maybe the girl just tempted him so much that he was compelled to take action for the good of the community.