Execution is not a deterrent for crime and never has been. If being publicly eviscerated and castrated doesn't stop an offense, what makes you think a needle would.
Enjoy
http://tudorstuff.wordpress.com/2009/03/30/tudor-justice-the-horrors-of-execution/
Execution may not deter crime, but in extreme cases like this i think it should be allowed. What possible explanation could be given for raping a baby? that person is a sick fuck, they should be executed and not have the chance to repeat the offense. In the ancient times people were stoned to death for much less than what we would execute someone for today. I'm not saying we should be that strict, but their should be capital punishment for raping babies/children doing other fucked up shit along that lines. Its one thing to make a mistake(girl was drunk, girl was slightly underage), but you would have to know what you are doing is wrong when its a baby/kid. there is no possible explanation for something like that.