inside that movie theater during those fateful moments. A young father shot and killed by a retired police captain. A 71-year-old who was upset with him. Tonight, that confrontation, all caught on... See More
inside that movie theater during those fateful moments. A young father shot and killed by a retired police captain. A 71-year-old who was upset with him. Tonight, that confrontation, all caught on tape. As we also hear from that retiree explaining himself, in the moments after he pulled the trigger. Here's ABC's Ryan smith. Reporter: 71-year-old retired police detective Curtis reiffs, knownfaced in court today, as prosecutors played video from inside the theater, showing the moment he shot Chad oulson, after a confrontation of texting. This is reieves. He leans over again. And again. And then gets up to talk to the manager of the theater. Minutes later, he's back, leaning towards oulson. Then, the moment that changed everything. Watch closely. Oulson grabs the popcorn, throws it at reeves. That's when he shoots. Watch again. A confrontation and a shot. Over in seconds. Pros cue tomorrows today also playing a recording of the interview with police minutes after the shooting, saying he felt threatened by oulson. It scared the hell out of me. I thought the guy was fixing to beat the Out of me. Reporter: Then, a shocking admission. As soon as I pulled the trigger, I said, oh, this is stupid there's no justification for what happened in there. If I had to it do over again, I would have never happened. We would have moved. Reporter: Late today, the judge ordered reeves be held without bail. I'm just very happy and relieved by the judge's ruling. Reporter: If convicted, Curtis reeves could face 25 years in prison. All for an argument over texting during a night at the movies.
This transcript has been automatically generated and may not be 100% accurate.