Why is it that claiming you have an "immature brain" would be an illegitimate response when being sentenced for a crime?

4 answers

Here's an interesting article on this subject.

http://www.psychologytoday.com/blog/plus2sd/200910/my-immature-brain-made-me-do-it
okay thanks
could you please help me explain how this is related to psychology ?
Doesn't behavior fall in the category of psychology?

http://dictionary.reference.com/browse/psychology