I've heard the same thing as Ness has, it's cheaper to toss someone in prison for life that execute them. Mainly because of the appeals process, the special care needed for someone of death row, etc., I'm not against the death sentence, especially for this specific case, but as a dollars and cents issue, it's a wash.
I would however like to see swift justice in this case. Make his trial a priority, give the inevitable appeals priority and get it done with. Execute the perp, or life sentence, it doesn't matter to me. Life without parole is a death sentence, just takes longer to get there.