Updated

Hosted by Bill Hemmer

For two years, Fox News has been investigating the short lives and violent deaths of Texas teenagers Amina and Sarah Said.

The sisters were riddled with bullets in their dad's borrowed taxi cab on New Year's Day 2008. As 911 operators listened in, Sarah appeared to name her father as the killer — her dying words: "Help! Help! My dad shot me... and now I'm dying!"

This kind of crime isn't supposed to happen in America's heartland — an honor killing.

Honor killings are when a father, husband or brother kills a wife, daughter or sister because he thinks she has "shamed" the family. The United Nations has found such murders are all too common in Muslim lands. Now they are happening here.

How and why?

Through exclusive interviews and never-before-seen footage, Fox News exposes the implications of this shocking case.