Drena De Niro visited her 19-year-old son Leandro‘s grave over three months after his tragic death. Robert De Niro‘s adopted daughter posted a heartbreaking Instagram tribute to the late teenager on October 16 with photos of her and a friend at Leo’s graveside. Drena, 52, showed off a rock with a winged heart on it that said, “To Leo, we love you. The world misses you.” Drena lost her son to a drug overdose on July 2.