The events after the confrontation are disputed. A violent altercation broke out and four of the eight victims were shot in the back, and three of these four were hit by multiple rounds. Vang is believed to have fired about 20 rounds from a Saiga rifle chambered in 7.62×39mm, which was recovered by police. One of the wounded hunters died the next day, bringing the toll to six dead and two wounded. Vang raised his rifle in one smooth, continuous sweeping motion as he circled right, kneeled, and aimed at Terry Willers. Vang later said, “If I don’t shoot him, he would shoot me.”[11][17][18] Hours after the shooting, Hesebeck told his wife that Willers did fire at Vang, though he later testified claiming that no one pointed a gun at or fired at Vang.[13][19]

Vang's first shot missed Willers as he ran and dove for cover, but Willers landed atop his rifle and couldn't turn over before Vang's second shot hit his lower left neck, neutralizing him. Vang instantly turned toward the men on their machines and shot Roidt; the round killed him before he fell, as his ATV, still in gear, moved slowly forward. Vang then shot and killed Drew. As the Crotteaus fled in fear, Vang fired three shots at Hesebeck at close range while chasing him around the ATV. The third round partially disemboweled Hesebeck, who fell and lay still.[11][13]

Bob Crotteau fled and called the cabin on his walkie-talkie, to tell Laski to bring guns. While Vang's first shot missed, a second hit and killed Bob Crotteau. Willers, meanwhile, had regained feeling in his fingers, and called the cabin for help.

By that time Vang was chasing Joey Crotteau, who fled down a trail. Vang sprinted to cut the corner to the trail, to close the gap, and shot him in the lower back at about 65 yards. Vang reloaded, and approached closer, as Crotteau struggled forward, and shot him again. Vang then closed in and shot him twice more from behind, including a final round into his head.

Vang, after reversing his blaze-orange jacket to its camo side, hid near a curve in the trail when he heard the ATV approaching. Thinking Jessica Willers and Laski were likely armed and looking for him, Vang waited until they passed. When he fired, the bullet struck Willers in the left buttock, and struck Laski, shattering his lower spine and abdomen. Vang ran over, shot Laski through the back, and then stepped behind Willers, and fired a shot through her neck.

Vang returned to the site of the first shootings to retrieve his scope. As he neared the site, he and Hesebeck came face to face. Vang said, “You're not dead yet?” He raised his rifle and fired, as Hesebeck grabbed Willers’ rifle with his right hand and dove for cover. The shots went over Hesebeck's head.[15][20]

Though he could point but not aim the rifle because of a wounded left arm, Hesebeck tried to shoot back. But when he pulled the trigger, the safety was still engaged. He dragged the unfamiliar rifle alongside his body to feel for the safety, and pushed it in. He pointed it again and fired once. He then heard a slight metallic sound from Vang's rifle, and realized Vang was out of bullets.[11][20]

Vang fled the scene on foot and discarded his remaining ammunition, later stating that he did not want to shoot anyone else. Vang eventually came across another hunter riding an ATV (who had no affiliation with the victims), and this hunter offered to give him a ride, eventually taking him to Vang's cabin. Vang was arrested when he returned to his cabin five hours after the shooting. An officer waiting for Vang placed him into custody and transported him to the Sawyer County Jail. His bail was set at $2.5 million.[11]

https://en.wikipedia.org/wiki/Chai_Vang

(http://www.autoadmit.com/thread.php?thread_id=5792411&forum_id=2#49393047)

Vang told the jury he feared for his life and began firing only after another hunter's shot nearly hit him. He detailed for the jurors how the other hunters approached him, and how he responded by shooting at each one. He says he shot two of the victims in the back because they were "disrespectful." He recounted with clarity how he killed each victim. While saying on the stand, "(he wished) it wasn't happening," Vang contended that three of the hunters deserved to die:

"Did Mr. [Robert] Crotteau deserve to die?" Wisconsin Attorney General Peg Lautenschlager asked.

"Yes," Chai Soua Vang replied.

Vang further testified that Joseph Crotteau "deserved to die" because he accused Vang of giving him the finger and "tried to cut in front of me to stop me from leaving", further saying that Alan Laski had provoked him by using a gun to threaten his life.[25] Vang re-enacted his deeds while on the stand, using his hands and arms to imitate the motions of firing a rifle. Vang's lawyers commented that some of his abnormal remarks were due to the language barrier. Therefore, when Vang responded affirmatively to the question that the Crotteaus and Laski "deserved to die," he had misunderstood Lautenschlager's question and had meant that the men contributed to the circumstances that led to their deaths.

(http://www.autoadmit.com/thread.php?thread_id=5792411&forum_id=2#49393083)