Police have arrested a woman in connection with the July 2 'drug overdose' death of acting legend Robert De Niro's 19-year-old grandson Leandro. Sofia Haley Marks, 20, is accused of selling Leandro De Niro Rodriguez drugs shortly before he was found dead in his New York City apartment. Marks has been nicknamed 'the Percocet Princess', was arrested Thursday night at around 6 p.m. in an NYPD undercover sting operation, according to the New York Post.