Police say Elizabeth McKeown, 46, slammed her Mustang into a car driven by Barbara Foster, 57, and then ran her over when she confronted McKeown

A former nurse from Missouri has been charged with murder after a road rage incident turned deadly and she ran her fellow driver over when she got out of her car.

Elizabeth McKeown, 46, boasted to cops that she's 'tricked' victim Barbara Foster, 57, by pretending to be 'nice' to lure her out of her car.

She'd then put her foot down and 'slammed into her and cut her in half.'

McKeown, a mother who lost her nursing license after being caught stealing prescription painkillers, was arrested and charged with first-degree murder.

Police say she had been on the way to the bank to try and make a car payment on November 20 when she got stuck behind Foster, a grandmother.

She began aggressively hitting the victim's car with her Mustang.

Eventually, Foster got out of her car to confront McKeown. That's when police say McKeown purposefully ran over Foster over in the horrific road rage killing.

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Eye-witnesses say they could not believe what they had just saw.

'She [Foster] is just sitting there saying you just hit my car, you are still hitting my car.' said Jamie Luaces-Adams told KY3.

'That is when she just started pushing. She must have backed up a little bit or turned because the woman who had gotten out of her car was trying to get back into her car and the Mustang came around the driver's side and went right over her,' said Austyn Adams, who used his vehicle to box McKeown in.

Barbara Foster (left) was the victim of a horrific road rage incident. Police say McKeown told them she 'tricked' Foster into thinking she would be still in the car- and instead ran her over to 'cut her in half.' McKeown, right, is pictured in her driver's seat as good Samaritans blocked her in from driving off after the incident

'I am looking behind me, I see this poor woman go underneath this Mustang. And I can't believe what I am seeing.' said Luaces-Adams.

Once people at the intersection realized McKeown was going to try and drive off- they took action.

Motorists who witnessed the attack quickly intervened to stop the suspect driving off, and blocked her into the intersection with their cars.

'At that point we realized it is like well she is not going to stop. I saw her coming up behind me, she is flashing her flashers and honking her horn and everything,' said Adams.

'And she came in behind me. And I cut back over and around that time the silver SUV on the right had pulled up to box her on the side.'

'My husband barely gets us out of her way in fear of her ramming us. But then kind of slides us in so we are blocking her from getting out. And she is just ramming the car in front of her trying to get free and get out,' said Luaces-Adams.

Once people in the intersection realized that McKeown they blocked her in with their cars as they waited for police to arrive

McKeown is charged with murder after the horrific road rage incident in Missouri

'You just ran this person over. You just ran that person over dude,' Austyn Adams said as he confronted her and recorded her in her car.

'I looked in the drivers side and she was just sitting there staring, holding the steering wheel. And she looked over at me and just kind of looked back.' said Adams.

'She just looked at me like no emotion, no anything, just staring. I told her it is like you just ran a person over, you're going to jail.'

McKeown was charged with first-degree murder, and prosecutors called her 'a potential danger to every single person in this community,' according to the News Ledger.

She told police in her statements after the crash that she had 'tricked' Foster.

'I tricked her, you know, make her think I was going to be nice, be still and everything.'

Instead, she said she 'slammed into her and cut her in half' with her car.

Barbara Foster was raising her granddaughters, they will now be cared for by their great grandmother.

McKeown is a former nurse, according to the News Ledger, and was fired from a nursing job in Arkansas at at St. Edward's Mercy Medical Center in Fort Smith in 2006.

Barbara Foster was raising her granddaughters- they will now be cared for by their great grandmother

She was caught stealing prescription painkillers, twice. Her nursing license was suspended according to Fred Knight, general counsel for the Arkansas State Board of Nursing.

McKeown is a wife, a mother, a real estate company employee and someone who struggled with bills as well as drugs.

Springfield police say its too early to tell if she was under the influence when she ran over Foster.

McKeown also has tax liens and a string of unpaid medical bills.

McKeown plead not guilty to the charge of first-degree murder and armed criminal action and is being held in the Greene County Jail without bond.