>> what drives a person to commit an honor killing? >> the only thing i want to know from him is how could he? how could he kill his girls? >> announcer: this hour fox news reporting, honor killing in america from new york here's bill hemmer. bill: 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 taxicab, new year's day 2008. as 911 operators listened in sarah appeared to name her own father as the killer. her dying words. but in hour is about more than just a horrifying double murder. it is about a kind of crime that is not supposed to happen in america's heartland. an honor killing. honor killing is when a father or husband or brother would