20/20 Season 47 Episode 8 A Killer Renovation

When Shanti Cooper-Tronnes, a beloved mom and successful businesswoman, is found dead in the Florida home she shared with her husband, David Tronnes, police suspected it was a robbery gone wrong. Why else would her $15,000 diamond ring be missing? When investigators dismiss that theory, they turn their attention to a home renovation that the couple had undertaken, which was to be profiled on the A&E show "Zombie House Flipping."