Ortiz, 19, was shot and killed by his neighbor, 41-year-old Jason Roche, who said Ortiz and his friends were shooting off fireworks, according to Austin police. Roche told investigators he shot Ortiz in self-defense, but police said cellphone video shows otherwise....

....The video shows Roche and Ortiz get into an argument, Roche’s arrest affidavit says. Roche is seen displaying a gun at Ortiz, reholstering it, then displaying the gun again multiple times, the affidavit says.