Unsolved: The Texas Killing Fields

More than 750 people are missing from Houston, Texas, and the surrounding towns. Women under 35 years old make up one third of that.

You've never heard of most of them because their stories don't make headlines. They are mothers and daughters, sisters and wives.

Hope Ann Moore disappeared decades ago, leaving behind a husband who detectives think knows more than he's letting on.

"Princess Blue" is a woman with no name. Just bones remain, and a high school class ring. Someone misses her. Someone knows what happened.

Then there's Audrey Lee Cook, murdered and dumped in the infamous "Texas Killing Fields." When no one cares, these missing women go unreported and their cases go unsolved.