This forum was just talking about modes of execution last week. I think that was that thread about Japan and their somewhat rare executions (by hanging).
So, as a Catholic, if I had to vote on the singular issue of the death penalty, I think I would vote against it but I do understand the range of emotions involved; and I think we should all try to do this.
Those accused are often found guilty of really horrible crimes like the one in this case.
See link for more.