I would rather see 1000 that deserve to die set free, than 1 innocent sent to his/her death. The number of innocent that have died at the order of a court are many, most people ignore this fact. I do believe that all will answer for their life in the here after. So if there is evidence for a conviction, then send them to jail for life, that is reversible if the facts later reveal that innocence is the case.
http://www.deathpenaltyinfo.org/article.php?scid=6&did=109
http://www.deathpenaltyinfo.org/article.php?scid=6&did=109