Convicted felon John McCluskey and an accomplice are still on the run. Officials believe they may be hiding in Yellowstone National Park. They're said to be extremely dangerous.
"They consider themselves as Bonnie and Clyde," said David Gonzales, the U.S. Marshal for Arizona. "This is very, very serious business."
Convicted felons Daniel Renwick, McCluskey and Province escaped from Arizona's Kingman Prison on July 30. Prison officials said McCluskey's cousin and fiancé Casslyn Welch tossed wire cutters to the men, who cut through the prison fence.
The three later kidnapped two semi-truck drivers at gunpoint and used the big rig to get away, authorities said. The group left the drivers unharmed in the truck at a stop just off Interstate 40 in Flagstaff and then fled.
Renwick was captured in Colorado on Aug. 1.
Province was found in a small town, not far from a church where he had attended Sunday services.
"This morning about six o'clock they observed Mr. Province walking in the area," Gonzalez said. "They immediately arrested him without incident and he immediately denied that he was Province but later admitted that it was him and that he was relieved that this manhunt was over for him."
The manhunt intensified Saturday after forensic evidence linked the two inmates and Welsh to the killings of an Oklahoma couple. Investigators found the bodies of Linda and Gary Hass, both 61, in a remote area of New Mexico on Wednesday, and evidence appears to tie the fugitives to the crimes.
"We have linked one of the subjects through forensics to the crime scene in Santa Rosa," said Robert Shilling of the New Mexico State Police.
The badly-burned skeletal remains of the couple were found in a charred trailer. Their pickup truck was found that afternoon 100 miles west in Albuquerque.
As national attention increases, police accuse McCluskey's mother of aiding in the escape and providing the fugitives with money. She was arrested on Saturday.
"He'll never realize how bad he's hurt me and his mother," said Jack Washburn, McCluskey's stepfather.
Officials said the fugitives have ties to Montana, which is why the search is focused on Yellowstone National Park.
Province was serving a life sentence for murder and robbery out of Pima County, Ariz. McCluskey was serving a 15-year prison term for attempted second-degree murder, aggravated assault and discharge of a firearm out of Maricopa County, Ariz. Renwick had been serving a 22-year sentence for second-degree murder.
"We are going to be on McCluskey like a cheap suit," Gonzalez said. "We are not going to pull this thing down. We're going to have all of the entire resources of the U.S. Marshals nationally until we bring these individuals to justice." The Associated Press contributed to this report.