Lindsay Collins faces several charges, including two counts of attempted first-degree murder, for threatening to kill her ex-boyfriend.

WINTER HAVEN, Fla. -- A Polk County Sheriff's deputy shot a 25-year-old woman who investigators say used a knife to threaten her ex-boyfriend.

Law enforcement was dispatched around 10:30 p.m. Tuesday to the ex-boyfriend's home on 16th Street NE near Dundee Road in Winter Haven. The woman, identified as Lindsay Collins, was reported to be inside the home, tearing up his house and sending several text messages over a woman she thought was inside.

"I will kill her," one such message said. Collins allegedly made mention she'd be bringing a knife.

"This was all jealous rage," said Polk County Sheriff Grady Judd, adding there actually was not a woman at the house.

As soon as Deputy Lancy Turley showed up, the woman began running with a knife toward the ex-boyfriend, investigators say.

"She sprints through the house, through a dimly lit area and the deputy sees her coming," Judd said. "She's chasing [the ex-boyfriend] full-on in a stabbing fashion."

The deputy then fired a single shot which wounded the woman, who is now in serious condition -- but stable.

A roommate of the ex-boyfriend was at the home, and he told investigators Collins threatened to kill the man. He even jumped into a boat in the backyard to try to get away from her.

"This was a very dangerous scene last night," Judd said. "She talked about her intentions. She showed up with a knife and if it weren't for the deputy intervening, [the ex-boyfriend] could have easily, easily lost his life last night."

Collins is charged with two counts of attempted first-degree murder, aggravated assault on a law enforcement officer, armed burglary and felony criminal mischief.

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