NEW : Simon has postponed heart surgery , spokesman said . The drugs involved were legal and used to treat a respiratory infection , according to an autopsy . NEW : Autopsy scheduled for Tuesday . Police say no evidence of foul play in death of British screenwriter . His wife , actress Brittany Murphy , 24 , died in hospital .
NEW : Simon has postponed heart surgery , spokesman said . NEW : Autopsy scheduled for Tuesday . Police say no evidence of foul play in death of British screenwriter . His wife , actress Brittany Murphy , 24 , died in hospital .