Police have arrested a woman in connection with the July 2 drug overdose death of Robert De Niro's 19-year-old grandson Leandro. The suspect, believed to be a woman but whose identity still hasn't been revealed, is accused of selling Leandro De Niro Rodriguez drugs shortly before he was found dead in his New York City apartment. Leandro’s body was found sitting in a chair beside white powder inside a $950,000, one-bedroom apartment on Wall Street in New York. A police source said the substance was found near his body and there were no signs of trauma. He was found by a friend who hadn't heard from him in a few days and was checking in on him.