Benjamin H. Smith

When Nancy Pfister was found dead inside her Aspen home, suspicion quickly fell on the couple who had been renting her house during her travels.

Just a week before Kelli Underwood's murder, she was in a yelling match with her ex's live-in partner, Kadie Robinson. Is that what led to her death?

When Kate Waring disappeared, investigators focused on her friends, who were the last ones to see her alive.

Lora Sinner had grown close with her ex-boyfriend's siblings Paul and Lori Smith, accompanying them on a California camping trip. She would never return from it.

"I just couldn’t take it no more," Michael Schallert said while detailing in his confession why he shot and killed an old friend who helped him out.

Seth Aidoo and Eunice Baah happily announced to friends they were engaged and expecting in January 2009. A few days later, they were found dead.

Detectives soon learned Annastasia Hester had a troubled relationship with the father of her child and his new wife.

After her husband's body was found set ablaze, Karen Coleman insisted the two had a good relationship. Investigators soon learned that was far from the truth.

Patty James wanted to get her hands on her husband's life insurance policy — which wouldn't happen if he went through with his plan of divorcing her.

Desperate to revive their company's finances, Long Nguyen and Huong Ly turned to Dephne Wright, a spiritual advisor who claimed she was able to lift curses — for a price.