Melissa and Matthew Trusseler's Relationship Became Strained

Melissa Trusseler says she and Matthew were having a great time when he was stabbed to death. She didn't know detectives had been tipped off by the responding officer that Melissa had told him there had been an argument at the house the night before. Detectives discovered digital observers inside the couple's home, which they say would prove Melissa knew more than she was letting on.