Robert Johnson left such a legacy of innovations in music that some thought he’d made a deal with the devil. His songs are still being played. A collection of his music won a grammy in 1990 and royalties for covers have been paid since the 70s but finding a legitimate beneficiary to the estate has been tough. Claud Johnson didn’t know who his dad was until 1971 and didn’t really think anything about it until someone approached him in 1998 after the blues singer’s half sister died. After years of legal hurdles (and some rather unique testimony) Claud has now inherited his father’s estate.