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Lakeland, Florida -- We're hearing chilling 911 calls made by a Lakeland woman's kidnapper during a 100-mile-an-hour police chase, with calm threats to kill her and himself.

Lakeland police got a call from Elizabeth Hamilton's mother saying her daughter was missing from work at a day spa at Lakeland Square Mall.

Detectives quickly confirmed the 26-year-old didn't just walk off the job -- she was kidnapped.

LISTEN:Brett Lee Curtis and Elizabeth Hamilton 911 callsWARNING: Graphic language

Lakeland Police say they're still piecing together just how Elizabeth Hamilton's ex-boyfriend, 28-year-old Brett Lee Curtis, forced her to leave the mall Monday night.

But they say her mom was right to be suspicious.

"She went out the employees' entrance, and actually found her daughter's purse and personal belongings laying on the floor," Lakeland Police Sgt. Richard Rose said.

"So that's what immediately caused her to have some concern about what might have happened."

Eight hours later, on the east coast, at the other end of I-4, a sharp-eyed police officer matched Curtis' car to a description in a statewide alert sent out by Lakeland P.D.

Curtis refused to pull over for police. So officers chased him, at speeds reaching 100 miles per hour, for around 30 miles. The pursuit stretched from South Daytona in Volusia County down into Brevard County.

"During that chase... Mr. Curtis actually called the Volusia County Sheriff's [Office]," Rose said.

"911, where is your emergency?" a dispatcher asks, in 911 recordings released by the sheriff's office. Curtis calmly replies, "If the officer following me does not break off pursuit, then people will be hurt."

"You're risking this woman's life," Curtis says sternly during another call. "We're heading south on I-95, you've got three officers ganging up on me right now. And I have enough ammunition to kill her and myself."

To show how serious he is, he put his terrified hostage on the phone.

"I have been kidnapped and we are being followed," Elizabeth Hamilton said, gasping. "And he is gonna maybe kill me if they keep following him!"

Police say Curtis fired a gun out of his car, but missed the cops on his tail.

Three gunshots can be heard in one 911 recording, followed by Curtis shouting into the phone, "Get off of my a-- now!"

When a dispatcher suggests, "Sir, why don't you pull over so we can end this peacefully?" Curtis cuts him off, saying, "That's not gonna happen!"

Stop Sticks spread out across I-95 blew out his tires. As the car stopped, Elizabeth made a bold, brave decision. She jumped out -- and ran.

She's now safe.

Brett Curtis never left the driver's seat. Police say he shot himself and died right there.

We don't know what led Curtis to do all of this. A judge had approved a temporary injunction to keep Curtis away from Hamilton.

She was scheduled to be in court on Tuesday to talk with a judge about making that temporary injunction a permanent one.

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