A new laboratory report lends credence to what actress Brittany Murphy’s father has long suspected: that she and her husband died not of natural causes, but of poisoning by someone out to kill them. “It’s a bona fide report,” the lab’s general manager, Denny Seilheimer, told TheWrap. “It was our client’s prerogative to release the report. That’s all I can tell you.” Murphy’s father, Angelo Bertolotti, didn’t accept the Los Angeles County Coroner’s Office conclusion that the “Clueless” star and husband Simon Monjack