He turned himself in, he basically admitted he did it. Not sure what more you want on this.
For a lot of people, this is just basic karma coming back, or maybe eye for an eye. However, if eye for any eye, he's already been raped, I guess the next stop is murder.
On a side note, remember this is a sickening story, so sickening that even the inmates of a Brazilian prison are sickened by this dude and that's why they are doing this to him.