Abducted girl, 17, 'brutally MURDERED woman with rock' while US Marshals were trying to rescue her from pedophile kidnapper whose mom was her victim

An abducted girl has allegedly killed her kidnapper's mother with a rock and strangled her while US Marshals were trying to rescue her.

Kaitlyn Coones, 17, from Cleveland, Ohio, is accused of murdering Nicole Jones, 53, days after she was snatched by the victim's pedophile son Jonathan Jones, 33.

She was said to have given Jones - who had previously been convicted over his relationship with the teen - five hours to kill his mom, before slaying her herself.

The fugitives fled across the southern border after the attack on April 11, sparking an urgent manhunt by the US Marshals.

They were tracked into Mexico before finally being found in Ahumada, Chihuahua, nearly a month later in May.

Although still 17, Coones is being treated as an adult as has been charged with aggravated murder, murder, tampering with evidence and abuse of a corpse.

Coones is said to have been picked up at a restaurant by Jones while she was still in foster care, before he drove her back to the home he shared with his mom Nicole.

She crawled in through Jones' bedroom window to hide from his mother who disapproved of her son having anything to do with the 17-year-old.

Prosecutors allege Coones gave Jonathan an ultimatum to kill his mother because she felt she was interfering in their 'relationship'.

Coones told him he had five hours to carry out the killing and when he failed to do so - even after giving him an extra hour - decide to do it herself.

'Kaitlyn had told Jonathan, that they needed to do something about his mother because she was preventing them from being together and she gave him five hours to do something about her, and at one point in the interview, she even mentioned to killing her,' said Detective Albright with Sylvania Township in court on Friday.

Prosecutors say Coones became so frustrated with Jones' inaction she carried out the cold blooded murder.

'She went outside retrieved a rock and when Nicole Jones was standing in front of the refrigerator in the kitchen, unaware of Kaitlyn's presence bludgeoned Nicole Jones a number of times and strangled her,' said Lucas County Prosecutor Andy Lastra.

Jones was allegedly sitting in the living room at the time while the brutal act was carried out.

The pair headed to a couple of stores in Jones' car where they purchased  tarp and trash bags in order to wrap the body and clean up the bloody scene in the kitchen.

Nicole's body was placed in Jones' car which was driven to a nearby apartment complex and tossed into a dumpster that was ultimately taken to landfill.

Police say it is unlikely Nicole's body will ever be found.

The two suspects quickly headed south and drove across the border to Mexico, where they were eventually arrested.

In court on Friday, prosecutors said Canton Police had contacted Sylvania Township Police in May in order to check in on the welfare of Nicole Jones.

It came after they received word from a foster home where Coones had been living the teen had texted a nurse saying she had killed two people and was on the run.

They told police a 17-year-old foster child in the custody of Stark County Children Services who was living at a group home was missing. 

They said the teen, Coones, allegedly sent a text message to a group home nurse saying she killed two people and that she was on the run.

In an interview with the FBI, Coones provided detailed statements and admitted to the killing of Nicole Jones.

Her details of where the body had been dumped matched GPS information that was tracked to Jonathan Jones phone and watch.

Coones attorney, Ann Baronas, said that the teenage was a victim of Jonathan Jones who was not supposed to have had any contact with her.