Board Thread:False Info and Speculative Discussion/@comment-76.68.119.86-20140718200837/@comment-174.44.173.83-20140718230908

He's a very vengeful person, only explanation so far, you could theorize he knew something about the Mute he didn't want others to know, but I think it's mainly just him being vengeful

And although it is inane to take out someone in custody, I just doubt that the Mute would've been willing to disclose any info, which is probably going to be along the line's of Peter's reasoning along with his pride