Police allege a Texas man was killed by his own niece on the day after Christmas following a squabble inside the Fort Worth home the two were living in. Ashley Siebenaller, 32, allegedly told detectives that it all started when she returned from a doctor's appointment on December 26 to find her uncle, Tony Vernon Graham, had locked her out of their small home, reports the Fort Worth Star-Telegram. But the tension continued when Graham, 64, allegedly told his niece she needed to start cooking for him.