Almost a year after two teenage girls were found dead — allegedly executed by their father — in the back seat of a taxicab in Texas, the FBI is saying for the first time that the case may have been an "honor killing." Sarah Said, 17, and her sister Amina, 18, were killed on New Year's Day, but for nine months authorities deflected questions about whether their father — the prime suspect and the subject of a nationwide manhunt — may have targeted them because of a perceived slight upon his honor.