Further details surrounding the death of Robert De Niro's grandson, Leandro De Niro Rodriguez, have come to light.

The 19-year-old died from a suspected overdose after he was allegedly sold fentanyl-laced pills, according to his mother Drena De Niro, who is the daughter of Robert and his ex Diahnne Abbott.

"Someone sold him fentanyl laced pills that they knew were laced yet still sold them to him," she wrote in the comments section of a July 3 Instagram post. "So for all these people still f--king around selling and buying this s--t , my son is gone forever."