If he killed her, he should rot in jail... In theory I agree with the death sentence for some crimes, but I do believe it is an easy way out. I'd stick him in prison with the general population. None of this seperate room in another part of the prison away from any danger..
As for his mother giving him an alibi... WTF.. When is she in court? Because if he is guilty then he clearly wasnt at home with his mother. She must have known he was hiding something... Did she stand up in court and say her son was with her, because if she did, then surely its perjury at least...
As for putting the blame on his choice of music.... Pathetic..... They've done the same with movies and video games before... Blame those for someones actions.... You know... One of the most violent programmes on TV... The News..... But does it ever get mentioned in murders, hell no...