Under anesthetic, subdivided and synthetic

Just playing devil's advocate here:

1) 13 year old hangs around with and looks up to a 17 year old who turns out to be a very bad person who influences him to participate in the crime.

2) 17 year old is removed from his ability to influence 13 year old

3) 17 year old goes to counseling

4) 13 year old decides to make something of himself, pursues sports and becomes successful at them

5) Has the now-18 year old learned his lesson? Has he changed? Is he the same person that he was when he was 13?