lekatt
“Your post is typical of a young person who has forgotten who they are and why they are here on planet earth.
Somehow I think you will feel differently after living 50 more years. Age has a way of bringing wisdom.”
Very condescending, and I would argue: inaccurate.  But since you brought it up I would ask that you explain who you think I am and why I am here (as you indicate that I have forgotten).  By any standard, I do not have 50 years left.  At what age does one attain your level of wisdom: the level that leads you to know everyone and their purpose? I haven’t lived my life in a box and have known both despicable and quality people.  I have plenty to say on what I believe the value of a human life is, but that would take this thread in another direction.
“Love”
Thank you.  Love is good.  Some say it’s all you need.
Lissa
“Can you guarantee that? That no innocent person, wrongfully convicted, could ever be experimented upon? Accidents do happen.”
Nope, no guarantees.  Let’s discuss this.
“Secondly, forced experimentation would most definitly fall under the “cruel and unusual” category of forbidden punishments."
Cruelty is administration of agony with no beneficial end in mind—like lifetime incarceration.  Unusual is relative—once a common practice, it is no longer unusual.  Keep in mind, when “Cruel & Unusual Punishment” was officially addressed in this land, the smoking bodies of “witches” had barely cooled.
“Thirdly, just because you’re a criminal, it doesn’t mean that you surrender all of your human rights… That’s what seperates the Good from the Bad: the Good respect human rights, even when someone doesn’t “deserve” them.”
I simply disagree with both statements.  The level of human rights surrendered should justly equate to those that the criminal violated.  Free room, board and education is no way to treat a person who takes the life of someone who had planned on working for those same things.  The “rights” belong to the productive members of our society.  In the spirit of the OP, I suggest that those rights include accurate scientific data about human physiology when it can be obtained.
“Fourthly…How “bad” does a person have to be before it’s “okay” to experiment on them?”
There is an intensity of interpersonal crime that sickens most people.  I think we can agree on that.  Personally I don’t think drug users (in general, certain elements of the distribution department, however…) belong in jail.  Violent criminals would be good candidates for brain research…again, this could become a doctoral thesis.
“Fifth, you cannot force an adult to accept medical treatment of any sort, because some people’s religious beliefs forbid it."
But by the same token, a Durable Power of Attorney exists that allows me to pull the plug on my atheist wife—without it she receives life support treatment…indefinitely, I guess.
“Sixth, a lot of medical experiments require an autopsy to see the effects. In a lot of cases, the subject has to die in order for scientists to be able to study the results.”
Yup.  Sucks to be an axe murderer doesn’t it!
“Seventh, the death penalty is…”
A waste of a human test subject.
“Eighth, what if the inmate is granted clemency, or has a successful appeal? If he’s been infected with a lethal disease, his release from the death penalty really doesn’t mean that much, does it?”
Guess not…how often does this happen?
By the way, I oppose the death penalty—prefer high output, low overhead labor instead.  Just in case our legal system fails someone.  But when you have an admitted killer—let’s talk about Ted Bundy and his ilk, well, why not use them?  It just seems like the data that you gather from a human would be more readily applied and more accurate.