Cooper and Spells were among officers who found Jones with a rifle and body armor when they went to his home east of Hackett, near the Oklahoma border.
A sheriff's deputy and a police chief were shot Wednesday morning in Arkansas, according to multiple reports.
"The dog was shot and during the fog of the gunfight, the handler was diving for cover and obviously his dog was doing the same", Hollenbeck said. He identified the gunman as 35-year-old Billy Monroe Jones.
Deputy Cooper was rushed to a nearby hospital and remains in a "serious condition" after having surgery, the Arkansas Democrat-Gazette reports.
Hollenbeck called the deputies who pulled the wounded officers in the line of fire to safety "courageous".
Hollenback said Cooper was 65 and "dynamic".
Lieutenant Pevehouse also said the man's father called police earlier in the day asking officers to check in on his son, but he didn't release details about the call. Court records show he has had a drug conviction along with a handful of minor charges.
The suspected shooter surrendered after a standoff with officers about 11:45 a.m. and was arrested.
The suspect was taken into custody several hours after the shooting was reported around 7:20 a.m.in a rural, wooded area near Hackett, a town of about 800 residents, according to Sebastian County sheriff's officials.
The officer who died has been identified as Sebastian County Sheriff's Office deputy Corporal Bill Cooper, 64.
Also shot was Hackett Police Chief Darrell Spells; a bullet grazed his head.
Sebastian County Sheriff's Lieutenant Philip Pevehouse said deputies surrounded the house where Jones had holed himself up after shooting the two cops.
A news conference on Wednesday afternoon provided details of a morning shooting incident that left one law enforcement officer dead and another injured in western Arkansas. KFSM said the call was related to a "family disturbance".
"Officers were able to take cover and at that time Mr. Jones started firing", the sheriff said.
The shooting was reported just outside Hackett at the intersection of Arkansas Highway 253 and Boone Road, according to KFSM.
Gov. Asa Hutchinson mourned the loss, which comes after the deliberate shootings this summer of police officers in Dallas and Baton Rouge, Louisiana.