I don't think the defence is necessarily trying to suggest that the music made TLM do anything, they are simply trying to drill into the juror's heads TLM's character.....Here is a nasty piece of work, a wannabe gangster, someone who listens to hard, violent, disturbing gangster rap, someone who writes disturbing, violent, sadistic letters about killing and raping and torturing others. Someone who has a known history of violence and trouble with the law.Someone who also has just testified to "savagely killing that little girl". Someone who is on video abducting that same girl. Someone who is on video buying the murder weapon used to kill that same girl.
Now here is MTR, someone who has NO criminal record, NO history of violence, someone who doesn't listen to violent gangster rap (that we know of). Someone who is NOT on video leading a girl away from school, is NOT on video buying a murder weapon. Someone who the crown can't prove that he sexually assaulted Tori. etc. etc. Someone who simply is guilty of getting mixed up with the wrong "murderous *****".
The defence doesn't have to prove that TLM did everything, they just have to prove that there is reasonable doubt about the charges, and so far, there is reasonable doubt.