Mainhart was a United States Air Force veteran who retired from the West Memphis Police Department after more than 20 years of service.
Yell County Lieutenant Kevin Mainhart, 46, was fatally shot on Thursday morning after pulling over a vehicle during a traffic stop because it was reportedly linked to a disturbance at the same residence where the standoff took place. State Police negotiators are attempting to make contact with the individual.
The ASP said Friday the suspect was James Arthur Bowden and not James Michael Bowden, 32, as originally stated Thursday during a press conference.
Bowden is being held in the deaths of Yell County sheriff's office deputy Lt. Kevin Mainhart as well as the deaths of two females, including one who is believed to be a child, police said.
Sadler said Bowden released a female hostage before he surrendered about five hours after the standoff began. She is said to be safe and unharmed.
At this time, authorities believe that the traffic stop and the deaths on Gum Springs Road are connected.
After responding to the Gum Springs Road residence, police found two more bodies, including a child, authorities said.
A passing motorist notified police that Mainhart had been shot.
I'm monitoring the situation and praying for the safety of everyone in Yell County especially our law enforcement and first responders. "This kind of stuff doesn't happen around here".
Arkansas Gov. Asa Hutchinson expressed "deepest sympathies" to Mainhart's family and the sheriff's department he left behind. He was the 16th officer so far this year to be shot and killed in the line of duty.
"Our hearts are saddened and we are in prayer for his family and officer who were his comrades that served and protect this county", Sadler added.
Bowden released the hostage about 30 minutes before he gave himself up to law enforcement.
"He was an extraordinary example of what a law enforcement officer should be", Gilkey said.