It's a murder trial that has captured the attention of the entire country, if not the world. And it's right here in our backyard. Karmelo Anthony is on trial for murder at a track meet in Frisco. The DA says he stabbed Austin Metcalf to death. Anthony admitted the stabbing, but he claims it happened in self-defense. On today's Ask The Expert, we're joined by our criminal expert, Dr. Alex del Carmen. He's a criminologist at Del Carmen Consulting.