The California couple accused of murdering a woman, kidnapping her three children and then going on the run were arrested in Colorado Thursday after cops found them by chance.
Brittany Humphrey, 22, and her 'husband' Joshua Aaron Robertson, 27, are believed to have murdered Humphrey's sister, Kimberly Harvill, and taken her kids on the run.
All three children were found alive in a New Mexico hotel Wednesday, but when cops caught Robertson and Humphrey they found them to be with a fourth child - the one-and-a-half-year-old daughter of a prison convict, the LA Times reported.
They are now back in California.
Caught: Joshua Robertson (left in 2014) and Brittany Humphrey (right in 2012) were arrested in Colorado Thursday. They allegedly took the kids of Kimberly Harvill, who was found dead
Tragic family: Harvill lost husband Kenneth Watkins (both pictured, with their kids) to suicide last year. Her body was found beaten and shot by a California rest stop on August 14
Robertson and Humphrey were caught by cops at a motel in Pueblo, around 100 miles south of Denver.
The police officers were engaged in an unrelated investigation at the motel when they came across Humphrey and the one-and-a-half-year-old girl, said Pueblo County Sheriff's Office.
Robertson was arrested about two blocks away; although he had been described as 'armed and dangerous' previously, neither he nor Humphrey put up a fight.
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ShareThe girl was Madisyn Harper, the daughter of a convict in Madera County, police said.
Her mom told investigators she had given permission for Robertson to look after her, but later filed a 'missing person at risk' report.
Safe: Harvill's kids, including Joslynn Watkins (pictured), two, disappeared around the time she died. All were found in a New Mexico motel Wednesday. Cops think the couple took them
Found: Brayden (left), three, and Rylee (right), five, were also found at the motel. Robertson and Humphrey had another kid with them when caught: Madisyn Harper, one
Harvill's body was discovered by a motorist who had stopped at Gorman Post Road near Lebec, California, on August 14.
She had suffered head wounds and multiple gunshots to the torso.
Her children Joslynn, Brayden and Rylee Watkins - aged two, three and five, respectively - were taken either just before or after her death, cops said.
They believe Robertson and Humphrey took the kids after killing Harvill.
LA County sheriff’s homicide Lt Joe Mendoza said that 'it is suspicious that they did not come forward to law enforcement and instead fled.'
The couple, formerly of Fresno, had been moving 'from motel to motel' and were staying in Lebec just before Harvill's murder, according to police.
Infant: Robertson (believed to be this man, in photo taken by Humphrey) was given permission to look after Harper by her mom, a convict. But she later filed a missing persons report
Happier times: Watkins and Harvill had been together for at least six years and had three children before he killed himself. Her children, now orphans, are in the care of the state
The children were found Wednesday at a motel in Albuquerque, New Mexico, where they had been left with a 'Good Samaritan.' All three were alive and well.
They will be placed in the care of the Department of Children and Family Services once they are returned to California, as their father committed suicide last year.
According to her social media account, Harvill was engaged to a man going by the last name Keithley.
The couple were set to marry on August 11, just three days before she was found dead.
New beginning: Harvill posted this photo on her Facebook page August 3. It shows her posing with her fiance, a man who goes by the last name Keithley. They were due to marry August 11
On August 3, she posted a selfie with her fiance with the caption: 'Soon to be Mrs Keithley 8/11/16.'
A day later, Harvill's sister, Brittney Humphrey, posted on her own Facebook page a photo of a shirtless man with tattoos on his chest, who is believed to be Joshua Robertson. The caption read: 'My husband.'
A news release from the Sheriff's Department Tuesday said Robertson was 'on post-release community supervision and has a previous arrest for possession of a firearm.'
Driven: Robertson and Humphrey had been seen driving a green Ford Expedition SUV like this one; it's not known whether they had it when they were arrested in Colorado
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