Hush

"When Riley Cowan finds her estranged husband Jeff dead in his palatial home, she's sure it's no coincidence. The police rule it a suicide, but Riley thinks someone's out for blood--specifically someone Jeff's father ripped off in one of the biggest financial fraud cases of all time. She suspects that someone is trying to send a message to Jeff's father: tell me where the money is, or everyone you care about will die"--