Margaret Reimann (Queen of Spades, California)

When 73-year-old Margaret Reimann was murdered in her garage while getting ready to leave for church in 1986, everyone immediately started pointing fingers at one particular relative. And in the investigation that followed, detectives uncovered a decades-long family feud, grudges that had been festering for years, and questions about just how far someone might go when there’s money on the line. But almost four decades later, new DNA testing pointed them in a completely different direction. And now, the case is hotter than it’s ever been.