Motives & Murders: Cracking the Case

In Iowa, a pregnant 23-year-old woman is shot in her own bed, and investigators must determine if they are looking for someone with a deadly grudge or a culprit closer to home.

In Cleveland, 14-year-old Gloria Pointer is snatched off the street, assaulted and murdered on her way to school, and it will take detectives nearly 30 years to put her killer behind bars.

On her last day of school, a 14-year-old girl is brutally beaten and set on fire, sending shock waves through her California community.

Years after a woman is shot, and the case goes cold, news of a potential prison confession leads investigators back to her front door.

In Oregon, 19-year-old college student Brooke Wilberger, a devout Mormon, is abducted from a parking lot in broad daylight, prompting a massive search that grabs headlines across the country.

The dumping of a woman's body prompts detectives to begin connecting the dots and find the link between seemingly random beatings, carjackings and murders.

Matthew Monahon returns home to discover his pregnant wife, Kelsey, hogtied on the floor and clinging to life, then she dies a few days later, and a $300,000 life insurance policy surfaces, turning Monahon into the number one suspect.

Kimberly Dunkin's body is found with a single gunshot wound to the head, and though investigators suspect she was the victim of gang violence, it will take 15 years, a deck of playing cards and a lucky break before the case breaks.

Debra Dill's bludgeoned body is discovered next to her car on a September morning in 1973, and it will take nearly two decades to put her killer behind bars.

After the blood-soaked body of a young woman is found on the floor of her apartment in Orlando, Fla., it's up to investigators to find her killer before he strikes again.