Your a funny man, "medical experiments", "death sentence" lol, you should work for the daily mail, your sensationalised pathetic reply doesn't even deserve a response, your cleverer than that mate.
locking a man away till he dies is a death sentence, by another name,
institutionalised, studied, find out what actually brings a person to commit a crime like that, try to gain a higher understanding of this type of persons mentality,
And yes that would be classed as a medical experiment, and I doubt he would be willing to undergo the experiment and study, and so it would be against his will.