Nanny of Extreme Makeover trainers saves the day after carjacker threatened to kill her and the couple's young son

PUBLISHED: 23:17 EST, 11 September 2012 | UPDATED: 09:40 EST, 12 September 2012

A quick-thinking nanny and anti-theft technology apps helped save a child from being kidnapped by a carjacker and helped police track down the assailant within a half hour of the attack.

Two of the star trainers featured on Extreme Makeover Weight Loss Edition had the scare of their life when their nanny came running in to their home clutching their 1-year-old son after fleeing from the carjacking.

Trainers Chris and Heidi Powell have been praising their 20-year-old nanny Kaitlyn McGrath ever since she helped save their son Cash from the carjacker.

Celebrity trainers Chris and Heidi Powell, seen here with their son Cash, used the anti-theft technology apps that they had installed in their car and on her iPad which helped thwart the carjacker

The incident occurred outside of the couple's Mesa, Arizona home on Friday when Ms McGrath was sitting in the family's Buick Enclave.

She was in the parked car along with the young boy who was playing on his mother's iPad.

A man, later identified as Jasper Stewart, approached the car and knocked on the window before demanding that she get out of the car 'or he was going to kill me and the baby', McGrath told ABC's Nightline.

Before getting out of the vehicle, she grabbed the young boy and ran back into the family's home.

Savior: The couple's nanny Kaitlyn McGrath was in the car with Cash when the man approached the car and said that they had to get out or else he would kill both her and the boy

Next steps: Once Kaitlyn ran back into the house, she got Heidi to call the police

'There was no question in my mind to save myself before Cash. It never crossed my mind to leave him or to stay in the car,' Ms McGrath said.

Caught: Because he grabbed an iPad that had locator software installed, police were able to capture Jasper Stewart within 30 minutes

Heidi Powell was inside the in-home beauty salon while Chris was in Milwaukee on a business trip.

'I wasn't there to protect my family and as a father this is our role this is ingrained in us and I have not dealt with that yet to be honest with you,' Mr Powell told Nightline.

Even though the man got away with the car, the family's security camera around their property helped police determine which way he fled.

Their OnStar tracking tool in their car was able to shut down the car remotely after it was reported missing, forcing the thief to get out of the vehicle and make a run for it.

Technology wasn't done thwarting his plans, however, as he made the mistake of grabbing Mrs Powell's iPad when he fled.

Because the trainer had installed the Find My iPad app on the tablet, police were able to activate it and determine exactly where the suspect was. He was arrested within a half an hour of the incident.

'We knew exactly where the guy was,' Mr Powell said.

The 35-year-old guy in question is believed to be a member of the Nazi Low Riders, a local gang known for their connection to violent crime.

'Makeover' Star's Nanny Describes Carjacking

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What has the childs name or the size of his mothers mouth got to do with anything!? Pathetic trolls, get a life and lets hope everyone has as much sympathy if anything traumatic happens to you and yours.

- me , Surrey, 12/9/2012 18:44

Click to rate Rating 30

A couple of things. First, the mom's mouth is huge, she could probably put a softball in her mouth, easily. Other than that, anyone that names their kid "Cash", deserves to have him kidnapped.

- hoochpit , Minneapolis, 12/9/2012 18:34

Click to rate Rating 54

What an idiot. Kudos to the nanny.

- jam , USA, United States, 12/9/2012 17:01

Click to rate Rating 52

Awesome nanny. Smart and brave! I hope they pay her well!

- That is me , in the center, 12/9/2012 16:35

Click to rate Rating 63

Comb his hair for goodness sake - and stop smiling or we'll have to divert all air traffic.

- Chris Allan , The Menagerie, Åland Islands, 12/9/2012 15:50

Click to rate Rating 56

Who names a kid "Cash" ?

- Barking Points , Out Where The Buffalo Roam, 12/9/2012 15:39

Click to rate Rating 42

I can't decide if she looks like a shark or an alligator - dear God that mouth takes up half her face! Please keep it shut Mrs. And sort your kids hair out. It looks ridiculous. Or maybe just get the nanny to do it as you are no doubt too busy having your own ridiculous harido done.

- Sam , London, 12/9/2012 15:38

Click to rate Rating 61

All of these thieving losers I keep seeing on the news need to get a real job and quit threatening of actually killing people who do work for what they have! I'm glad no one was hurt in this case!

- Cree , TN, U.S.A., 12/9/2012 15:22

Click to rate Rating 66

Why do they need a nanny, they only have one child! Typical rich people, so used to paying people to do everything for them--including raise their children. Glad they are okay. - Ally , Virginia Beach, United States, 12/9/2012 12:41 ********** What's it got to do with anyone else what and who they spend their money on. They both have careers so what?

- julie , essex, United Kingdom, 12/9/2012 15:21

Click to rate Rating 72

Do something with that kids hair!!

- bobbylen , Ohio, USA, 12/9/2012 15:08

Click to rate Rating 39

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