Adam Rich, who as a child actor starred in the 1970s sitcom Eight Is Enough, died in January of an accidental fentanyl overdose. The cause of death comes via an L.A. County Medical Examiner’s autopsy report, obtained by TMZ, which also reveals that the 54-year-old had non-toxic levels of alcohol and lorazepam when he was found dead in his home in the Los Angeles area five months ago. Rich starred as youngest son Nicholas Bradford on Eight Is Enough, staying with the ABC sitcom for all five seasons between 1977 and 1981 and reprising the role for reunion TV movies in 1987 and 1989. He also starred in the TV show Code Red and guest-starred on St. Elsewhere, Silver Spoons, Small Wonder, and Baywatch before leaving film and TV screens in 2003. Stephen Shugerman/Getty Images In his adult years, Rich struggled with substance abuse and was once arrested for allegedly stealing drugs from a pharmacy,...