A successful, seemingly healthy doctor collapses at home and is rushed to the ER, leaving friends and colleagues puzzled.

Lisa and Kevin Knoefel seemed like the perfect couple. They were busy raising three children, and then welcomed a foster child too. When Sabrina admitted to killing Lisa, no one could understand why. This case was about to get very complicated.

Marc Despain was a married father of two and a successful real estate appraiser. He was busy building a life, until his ended all too soon. Investigators wondered if money was a motive, or maybe a family rift. His loved ones wanted answers.

When Eric Somuah was found shot in his bed, it was hard to imagine who would want the outgoing salesman dead. One dogged detective refused to give up. His investigation put him on a path filled with twists, turns and an ending few saw coming.

Michele and Lloyd Neurauter were devoted to their three daughters, even after divorce. When Michele was found dead in her home, police suspected suicide. Then, they uncovered a deadly betrayal too twisted to be true. Except that it was.

Halee Rathgeber enjoyed taking care of others, so it made sense that she hoped to become a nurse. What made no sense was that someone wanted her dead. The crime scene told detectives little, but a jaw-dropping moment in the courtroom spoke volumes.

When a mother of four dies unexpectedly on Valentine's Day, everyone in town assumes she died of natural causes until a detective suspects someone has gotten away with murder.