The night Emily Mason was murdered, Phillip Kirby Sr. told police he was involved in a one-car wreck, and that's why he was bloodied — and missing his wedding ring. Nancy Grace doesn't buy it.

New Jersey teenager Sarah Stern disappears, and cops look to her family and friends for clues. They discover that some of those closest to her may not have been all they seemed, unraveling a tale of misplaced trust and deadly greed.

Exhausted and likely in shock, Walt Mason didn't even realize he was being interrogated as a prime suspect after the murder of his wife, Emily.

A friend says that Emily Mason was a "little powerhouse," and not easily intimidated. After her murder, the friend thought that Emily likely confronted a robber, because she'd done it before.

Emily Mason's husband, Walt, notes that his murdered wife has, by that time, missed 17 Thanksgivings, Christmases and Halloweens with the family. The couple will never grow old together. "She was a bright candle,' he says.

Liam McAtasney confessed to a friend — in a car that police had bugged — exactly what happened the night of Sarah Stern's murder.

A lead witness when Walt Mason was a suspect in his wife's murder recalls him approaching him in Walmart. The witness was tense, but Walt just shook his hand and said, "Sh*t happens," the man recalls.

An investigator says he will never forget the image of Emily Mason's body, and the "awesome terror" she must have gone through in her final moments, being stabbed to death while her children sat nearby in the bathtub.

Walt and Emily had an "opposites attract" sort of relationship, and were good parents, a friend says. They eventually had marital troubles, but still, "they were in love."

The quiet of the small town's evening was broken by Emily Mason's murder. Here, a portion of Walt Mason's chilling 911 call after finding his wife dead.

A home in rural Swainsboro, Georgia, is hard to imagine being filled with blood and screams, Nancy Grace says. This small town would soon get a taste of murder, though, and the way our system of justice can fail those who need it most.

Sarah Stern's friend recalls how involved her parents were. As an only child, she was raised to be a "very fun and loving, spectacular girl," her friend says.