The first officer at the scene saw people shot in the backyard, and decided he couldnt wait for backup. The first thing he heard was shots being fired. He saw people in the backyard that were down, that were shot. So he instantly knew what was going on. He went into the house on his own, Rushin said. He made that decision that he couldnt wait for backup, for another partner, to go in as we were trained and go in to stop the shooter. And thats exactly what he did. He actually found the shooter inside and ended his shooting spree. One witness described to WFAAs David Goins the fighting she heard right before the shots were fired. While Plano police are investigating the homicide, the Texas Rangers will investigate the police officers shooting of the suspect. Watch G.I. Joe: Spy Troops The Movie