A 24-year-old woman who says she was Tasered and shoved by a Miami-Dade police officer after a traffic stop is suing him and county government in a federal civil rights claim.

Lisa Thomson is seeking $2.5 million in damages, alleging officer Jerry Davenport used excessive force and that the county was aware of his history of alleged abuse as a DUI specialist.

Thomson was stopped on U.S. 1 the night of Nov. 19, 2005 by Davenport because he suspected she was driving under the influence of alcohol. Thomson completed a field sobriety test and was not arrested.

But then the University of Miami student's run-in with the veteran cop turned ugly, according to her lawsuit filed Monday in Miami federal court.

Davenport wrote Thomson three tickets for speeding and having no driver's license or proof of registration. The suit says Thomson grew confused when the officer ordered her to sign the ticket, because she claimed she had registration in the glove compartment. She called her mother on her cell phone.

"While Ms. Thomson was attempting to place the call, Officer Davenport pointed his Taser gun at her and ordered her to sign the ticket or get out of the car," according to the suit, filed by lawyer David Kubiliun.

"Before she could get out of the car, Officer Davenport fired his Taser three times, striking her each time in the area of her left breast."

Thomson lost consciousness and was taken by Miami-Dade Fire Rescue to Jackson Memorial Hospital for treatment. There, the officer allegedly grabbed her by the neck and slammed her head into the wall of a holding area before taking her into custody, according to the suit.

Davenport arrested Thomson on one felony count of battery on an officer, another felony count of resisting an officer with violence and a misdemeanor charge of resisting an officer without violence.

The Miami-Dade State Attorney's office dropped all the charges.

Miami-Dade police said they could not comment on a pending lawsuit. Davenport's lawyer, Teri Guttman Valdes, could not be reached for comment.