Spokane County Sheriff's Deputies made an arrest in an armed robbery and car-jacking at WalMart and it was all caught on camera.

Detectives say a couple in their 90's were kidnapped by 24-year-old Blaine Cornwell as he tried to make his getaway from a botched shoplifting attempt.

Investigators say Cornwell's girlfriend was waiting in a car in the parking lot to help Cornwell escape with stolen electronics. When she saw security guards chasing him out, detectives say she panicked and drove off.

The backpack Cornwell was carrying is what caught security guard's attention. Video shows Cornwell in a brown vest and plaid shirt zipping the backpack closed with a stolen Blu-ray player inside.

"Mr. Cornwell was at the Valley WalMart, attempted to take a blu-ray device out of the store without paying for it, security loss prevention saw this, confronted him, tried to get him to come inside," Spokane County Deputy Craig Chamberlin said.

Had he surrendered, Cornwell would have gotten a ticket. Instead, he pulled a knife on the guards and that's when his shoplifting became an armed robbery.

"This is on video," Chamberlin said. "[He] pulls out a knife out of the right pocket of his coat and then threatened the security guard with it and then ran off."

A different camera catches Cornwell running to a handicapped parking spot where he hopes into this white Dodge Intrepid.

"Husband was in the front passenger seat, wife was in the back of the vehicle. Mr. Cornwell jumped into the driver seat of the vehicle, kidnapped those two and stole the vehicle and then fled the scene," Chamberlin said.

The couple, both in their 90's, begged Cornwell to let them out but Cornwell didn't stop until he reached Barker Road.

"Obviously, extremely scary for those folks to have someone let alone steal their car and then threaten while they're inside their own vehicle," Chamberlin said.

Detectives say Cornwell, who's suspected of another robbery the first week he was in Spokane, is a drug addicted thief.

On his Facebook page, Cornwell almost predicted the thefts at WalMart when he wrote: "Feel like I'm spiraling out of control and if backed into a corner, I will do what I need to do."

"The majority of these crimes, just in general, the reason those are taking place is to feed these folks' drug addiction and it's very sad for the community," Chamberlin said.

Cornwell is also a danger to the community, so on Friday a judge set his bond at more than a half million dollars.