Boston ? The teenager accused of going on a rampage at a gay bar and later killing two people fatally shot himself in the head in a gunfight with Arkansas police, authorities said Tuesday.

Jacob Robida, 18, of New Bedford, turned the gun on himself Saturday after he fatally shot a West Virginia woman who was in his car, said Bristol Dist. Atty. Paul Walsh Jr.

Police originally said that they shot Robida on Saturday after he fired at them at the end of a high-speed chase in rural Arkansas. Robida killed Gassville, Ark., police officer Jim Sell and led police on a 20-mile chase before being stopped in nearby Norfork.

Early Thursday, police say, Robida used a hatchet and handgun to wound three men at Puzzles Lounge, a gay bar in New Bedford.

Walsh said Robida’s autopsy proved that he was killed by the same gun used in the bar attack. He said that gun also fired the bullet that killed Jennifer Rena Bailey, 33, an acquaintance Robida had picked up after fleeing Massachusetts.