As Sylvester Stallone prepares to bury his son this weekend, INSIDE EDITION has confirmed that he's hired a well-known private investigator in hopes of getting to the bottom of the tragic death.
P.I. Scott Ross has worked on several high-profile celebrity cases, including Michael Jackson's child molestation trial. He also worked for Robert Blake after the actor was accused of killing his wife.
Police say there is no evidence of foul play, but Stallone reportedly wants his P.I. to probe exactly what 36-year-old Sage Stallone did in the final two weeks of his life.