You forgot "permanent"
A crowbar or one of my blades in the right place will do that, and since he's never met me he won't know who hit him.
First is the time without her when I can say VERY loudly that he's a paedo, when he's trying to tout for business, then it's a time of my choosing to point out he's a subhuman.
I've waited 8 years for her to identify him, and now timing is on my side because he knows he got away with it thanks to the laws here. And when the law won't punish, "natural law" comes to the fore. He's mine, at a time of my choosing. And I have an abundance of patience when necessary, and then all it needs is the right moment and 2 minutes of frenzy
Honestly, I'm a decent bloke, I'll generally help anyone if I can. But some people, well, they deserve to be crippled more than I am and I only need that small burst of energy because no matter how much it hurts me, he'll suffer more.
On the bright side I got some wonderful artisanal beer today so it wasn't a total loss