his lawyer admitted it in court. >> hemi neumann shot and killed rusty schneiderman. >> reporter: the why gets sticky. the prosecutor said neumann killed in cold blood because he was in love with andrea and wanted him out of the way to he could marry her and raise her two children. the defense says neumann is a sick man who killed, not from hatred, but from insanity. >> he has a delusional disorder. >> reporter: and here's the shocker. the defense is arguing a devil that sounded like singer barry white -- ♪ i put you up >> reporter: told him to kill himself. and then, an angel resembling olivia newton-john, told him to kill schneiderman. the prosecution makes one of this. >> he says that andrea's children are his children. >> reporter: the defense is counting on it to save him from life in prison. >> the angel told him that rusty was going to harm the children. that he needed to protect the children. that he needed to kill rusty. >> reporter: in order for the insanity defense to be successful, the defense will have to convince the injujury, only that he has a mental illness that cause