died of a drug overdose at the age of 39.The 58-year-old reality star took a trip down memory lane and shared two vintage images of himself with his son on Instagram from decades ago and the pair is unrecognizable.In the first photo, Harrison holds a young Adam on his shoulders as they walk down the stairs outdoors surrounded by mountains and trees. The duo are all smiles, and Harrison, who now sports a bald head, looks almost like a different person with a head full of luscious brunette hair. In the second image, the father and son are both asleep cheek to cheek on a couch cradled in each other’s arms.