I agree, the system of investigation and of judgement can be and should be improved. Perhaps the way of conducting the hearings in the courtroom should be changed in order to completely eliminate the “emotional” impact on the jury. As it said, only proved facts and evidences should be taken into consideration… But again, it depends on the crime. If there is any chance for rehabilitation, then yes, the system should do everything to try to return to society mentally healthy person, after the person has comleted in full his/her sentence and after going through intensive rehabilitation program.. but.. If some serial killer is sitting in front of you, who brutally murdered 10-12 innocent teenagers, torturing them before killing… hhhmmm, it is impossible to avoid emotional “side effect”, and sorry edifes, there is no any other punishment for such mental freak, but to be executed, preferably with torturing prior to execution…
Don’t say, "I think nobody has the right to give some one a death penalty...whatever the crime is".. as it is known, the closer you are to the victim, the more you will be inclined to want the death penalty.