Oklahoma discussion of citizens with guns killing active shooter.  When police arrive, how do they know which shooter is good, and which is the assailant?

"‘There were three shooters’"
Two Oklahoma citizens killed an active shooter, and it's not as simple as it sounds"

Story by Frances Stead Sellers and Mark Berman        JULY 13, 2018

https://www.washingtonpost.com/news/national/wp/2018/07/13/feature/in-all-reality-there-were-three-shooters-oklahomans-kill-an-active-shooter-and-its-not-as-simple-as-it-sounds/?utm_term=.ffc97b6edb08&wpisrc=nl_most&wpmm=1 

"In a matter of seconds, the two armed citizens became self-appointed protectors, moving to take up positions around the shooter, drawing their weapons and shouting for him to drop his. Time stretched and warped. There was an exchange of gunfire. The gunman was hit several times and fell. As Nazario and Whittle converged over the man to restrain him, police arrived. Unsure who was who, officers handcuffed all of the men and put them on the ground as the shooter bled out into the grass and died.

“I was just doing what I was supposed to do,” recalled Nazario, a former police officer who said he now works as a security guard, always has his gun in the car and usually carries it with him.

“I just reacted,” said Whittle, who has served for nearly 20 years in the Oklahoma Air National Guard and works for the Federal Aviation Administration. “There’s a guy with a gun. I’ve got a gun. Stop the threat.”

Though they were loaded into police cars and taken downtown for questioning, they were soon hailed as heroes. They were also called champions of Second Amendment rights, gun-carrying examples of why Oklahoma’s Republican governor should not have vetoed a bill two weeks earlier that would have eliminated the need for a permit and training to carry a gun in public."

It is confusing and dangerous for non-law enforcement gun carrying people to start shooting at an active shooter situation.

"

As police gained control of the scene, Jabari Giles, father of one of the wounded girls, rushed to the scene. Seeing Whittle and Nazario handcuffed on the ground and a bloodied body that he took to be a victim next to them, he exploded.

“Which one of you did it?” Giles shouted. “You f—ing shot my kid, didn’t you!”

Giles did not have a gun, but police turned theirs on him and briefly handcuffed him before helping him locate his child."

Did either civilian "hero" shoot an innocent bystander?  NO.  But they could have.

"The FBI examined 160 shootings between 2000 and 2013 and found that most of the violence ended when the assailant stopped shooting, committed suicide or fled. Unarmed citizens successfully restrained shooters in 21 of those incidents, according to the FBI. Two attacks stopped when off-duty officers shot and killed the attackers. Five ended in much the way the attack at Louie’s did — when armed civilians, mostly security guards, exchanged fire with the shooters."

The numbers are not good in my opinion . . .

"But interventions by “Good Samaritans” also have ended in tragedy.

In 2014, husband-and-wife attackers killed two Las Vegas police officers before going into a nearby Walmart and firing a shot in the air. Joseph Wilcox, 31, a civilian with a handgun and a concealed-carry permit, pulled his weapon to confront the male shooter, but the man’s wife shot Wilcox in the chest, killing him.

When Prince George’s County police detective Jacai Colson responded to a 2016 attack on a police station in his street clothes, another officer mistook him for a threat and shot him."

Wow!  Not good.