Transcript for Deadly pool party shooting leaves 1 dead

New images of a moment of a man sitting at a pool party calmly pulls out a gun and starts shooting. Shooting seven people, killing one of them. Taking the time at one point to reload. Authorities say as he was doing it he was on the phone with his girlfriend making her listen to what he was doing. ABC's Matt Gutman on the scene in la Jolla. Reporter: Tonight, that first glimpse of the man who terrorized this upscale San Diego apartment complex. You can see the shooter Peter Selis, feet up on that lounge chair. Then casually pointing his gun. Seconds later -- a shot. Just after 6:00 P.M. Sunday, police say Selis had emptied at least one full clip at the partygoers around this pool. We literally saw people jumping out from the fences and running away like crazy. Reporter: In the panic, chairs tossed into the water. Blood everywhere. We need an ambulance! Reporter: 6:13 P.M., police arrive on scene, a police chopper spotting the suspect. Two to three people down. The suspect is reloading in the pool area. White male40. Reporter: Seconds later, officers close in. Drop the gun! Reporter: Police say Selis fires and officers return fire. Selis was pronounced dead at the scene, and around him, carnage. And terror. Clong student kaela Wong got trapped in this jacuzzi. He told people if they wanted to live they should leave, and he said, "If you stay you die." Reporter: One woman was killed. And six others were shot, all of them people of color. But tonight, police say it wasn't race, but the 49-year-old mechanic's breakup with his girlfriend, that triggered that Rampa rampage. Selis stayed on the phone, talking to his ex-girlfriend as he continued to fire his weapon. It is apparent that Selis wanted his ex-girlfriend to listen in as he carried out his rampage. Matt Gutman joins us from the scene. At first there was talk this was a hate crime police don't believe that was the motive? Reporter: That's right, David, right now police are calling this a quote spontaneous act of violence. They say there's no indication that race played any role here. They say those victims just happened to be in the wrong place at the wrong time.

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