Heartbreak all over again as the mother of a slain teenager relived the tragedy that took her son away from her on "After the First 48" (Thu., 9 p.m. ET on A&E). In 2010, 15-year old Albert Cardenas was shot and killed in his friend's driveway by robbers hitting the house.It was a senseless loss that his mother still feels as raw today as she did when it first happened."I have it all day running in my mind, what my son went through, "she said.