The Millionaire Murders: Carol & Stephen Baxter

Carol and Stephen Baxter were the perfect neighbours, living in the perfect neighbourhood. So when they were found dead in their home, no-one could figure out why. Theories started spreading like wildfire. But when investigators started to peel back the layers, the truth was like a Russian doll. The more they found out, the more startling the situation became.
This is the chilling case of The Millionaire Murders.