This shouldn't surprise anyone.
This Rolling Stone Article goes way more in depth on the issue, but this is my favorite part:
The officers next approach the parking lot where Stallings is standing, and immediately open fire with less-lethal rounds. "When they encounter Mr. Stallings," Rice says, "they did not give any sort of warning or announcement that they were going to use force."
Stallings was hit by one of the officer's 40mm rounds. The Army vet, who is black, believed he was under attack by white supremacists, whom Mayor Frey had warned could be in town stirring up trouble that night. He fired back at the unmarked van three times with his legally registered and carried pistol. The rounds did not hit any of the officers, but the police can be seen cowering in the van as they shout out, "Shots fired!"
The van then halts and cops storm out, identifying themselves to Stallings for the first time. Stallings lay on the ground to surrender to the cops, who can be seen beating him. But he managed to get arrested without suffering life-threatening violence.
Stallings was later charged with eight counts, including attempted second degree murder and first degree assault. Despite the mitigating video evidence in the case, the charging attorney still wanted to throw the book at Stallings, asking him to plead guilty to counts carrying 13 years in prison, according to Rice.
Rather than accept this plea deal, Stallings pursued his right to a jury trial. This was a significant risk " as one assault charge alone carried a 10 year mandatory minimum sentence. In the end, the jury favored Stallings' claim of self defense. The deliberations lasted just "three hours, including a lunch break," Rice says. Stallings was found not-guilty on September 1st. He is now weighing a civil case.