Karma already caught up with the offender, he stooped so low as to key someones car. I think life dealt him a rough hand there. No respectful person would do this, they'd confront the person they had a problem with.
This is true actually, only a total scumbag would ever do that.
My favourite post incident Karma was when a drunk guy I went to school with (year above) kicked my car on the driver side rear quarter. He was at the time driving a mint fiesta RS Turbo. Anyway, I calmly said 'watch yourself' to him and less than a week later his RS had a spin and his driver side rear quarter bore the brunt. Car written off. I took great pleasure saying to him 'saved me the bother' but I had no plans to do anything - I'm just not like that.