Sylvester Stallone Hires PI to Investigate Son's Death Plus, Westboro Baptist Church will protest Sage Stallone's funeral By Mary Papenfuss, Newser User Posted Jul 18, 2012 12:01 AM CDT 21 comments Comments An investigation is continuing into Sage Stallone's mysterious death. (WUNDERWEIB) (Newser) – Sylvester Stallone has hired a private investigator to look into son Sage's death, TMZ reports. Scott Ross was involved in the investigations into the Chris Brown/Rihanna assault and the Michael Jackson molestation case, and he will look into Sage's final weeks and his cause of death. The New York Post adds that Sage Stallone had extensive dental surgery two weeks before he died, and that his mother begged him not to go through with it. "I’ve heard about people dying having multiple procedures done to your mouth. Do not have more than one tooth [pulled]," Sasha Czack says, adding that Sage was on painkillers following the procedure. TMZ reports that a white powder, which could be cocaine or crushed Vicodin, was found in the room where Sage died. And in case Stallone doesn't have enough grief to deal with in the mysterious death of his 36-year-old son, the Westboro Baptist Church has decided to pile on. The group, famous for protesting soldier funerals as part of its anti-gay movement, plans to picket Sage Stallone's funeral to protest his famous dad's love life. "Thrice-married rebel taught his son to mock God. #picketfuneral," tweeted Margie Phelps, daughter of controversial preacher Fred Phelps. "Adulterous dad brought wrath of God on son," she tweeted later, according to the Huffington Post.