Inheritance. Ben Hood Thrillers, #25

Ex Detective Sergeant Ben Hood unexpectedly inherits his aunt's beachfront land and a beautiful house following her death. Her doctor indicated that she had suffered a heart attack and she was buried without an autopsy. Ben found some garden hose protruding through a tiny hole in her bedroom floor. He suspected a gas had been introduced to trigger a heart attack. Her body was exhumed and an autopsy performed.
She had been murdered. Her doctor then fatally shot himself. Ben's sudden windfall was about to become his greatest nightmare.