a peaceful night in coppell, texas, erupts in panic. >> oh my god, oh my god, oh my god, he's shooting himself on the heart. and he's dead right now. he shot himself. yes. >> but just one week before that desperate 911 call, it was moving day for jonathan cruz, the 27 year old urgent care director moved from his parents home and into his first apartment. his younger sister danny, proud of her big brother's step. >> he'd gotten a new car recently and he was just he was really happy with where he was going. >> right by his side. his girlfriend, 26 year old martial arts instructor brenda lazaro. danny had introduced them. >> she was a good friend of mine for about two years. >> the two women met at karate school where brenda taught, and danny attended classes. soon, danny's brother joined the karate studio and fell for the instructor. >> he actually asked for my permission to ask her out because he knew she was my friend and he didn't want to get in between that. >> but once they started dating, serious sparks flew. >> he was the kind of guy where he fell hard. >> but before jonathan coul