It all happened so quickly.

A 20-year-old unarmed Utah man was dead, shot twice by a Salt Lake City police officer. It happened 21 seconds after police responded to a 911 caller who said she saw "some gangbangers" who "flashed" a gun and were "obviously looking for trouble" outside a South Salt Lake City convenience store.

Dillon Taylor's shooting death in August of 2014 was captured by the body cam of Officer Bron Cruz, who told investigators that he shot Taylor because there was "just hate, defiance, that he had in his eyes." With more than 4.2 million YouTube views later, the footage is key evidence in the Taylor family's civil rights lawsuit against the Salt Lake City authorities and Cruz. The footage shows Taylor walking away from the officer who shot Taylor three seconds after turning around. Cruz said he believed Taylor was armed and dangerous, as Taylor's hands initially were in his waistband.

According to the family's Wednesday lawsuit (PDF), the video shows that the shooting was "needless and unjustified." The authorities, however, say the footage clears the officer of wrongdoing and that the shooting was "reasonable."

As more police agencies begin employing body cams in the wake of last year's Ferguson, Missouri, shooting death of a black teen by a white officer, we should expect to see more and more disputes over what body cam or other footage of police activity actually shows or means.

Here is Taylor's family's take on the video, according to the lawsuit.

Video of the shooting shows that Dillon's back was turned to Defendant Cruz making it impossible for Defendant Cruz to "sense" a look of "defiance" in Dillon’s eyes. Regardless, in the United States of America, and in Utah, citizens expect consequences and not cover-up when unarmed teenagers like Dillon are killed because of the irrational subjective perceptions of "defiance" by trigger-happy law enforcement. This federal lawsuit is being brought out of necessity because the Salt Lake City Police Department and all Defendants defy accountability and defy justice and continue to attempt to justify the unlawful killing of an unarmed boy named Dillon Taylor.

In the video, two family members with Taylor stop and put their hands up outside the 7-Eleven store. (Those two were arrested, detained for hours, and released.) Taylor keeps walking, however, according to the video. "Get your hands up now," the officer is heard yelling, according to the tape.

"No, fool," Taylor says, according to the tape.

Taylor takes his hands out of his waistband and lifts his shirt and is shot twice, according to the tape. He is hit in the chest and stomach. The tape shows Taylor being handcuffed by the officer who radios for medical assistance.

The Taylor family's suit said the tape shows him complying with the officer's demands.

"In compliance with defendant Cruz's demands, Dillon turned around, pulled up his hands, and showed them to defendant Cruz," according to the lawsuit.

The authorities said the video and the officer's mental state justified the shooting. Prosecutors said the video comported with the officer's stated belief that he thought Taylor "was armed with a gun and intended to use it."

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