ORLANDO --A University of Central Florida police officer is under investigation after video of a traffic stop surfaced, showing a student's car window shatter after he claimed she started to roll it up on his hand.The traffic stop happened Wednesday, Sept. 4 along Gemini Boulevard on the UCF campus.Video from UCF Police Officer Timothy Isaacs's lapel camera showed him pull over Victoria King for a broken brake light. King, who was 25 at the time, said the car was her mother's, and she did not have the vehicle's registration card.After Isaacs processed King's information and walked back to her car to give her a ticket, King, who was identified as a UCF student, became upset and refused to roll down the window when the officer asked multiple times.When she refused to roll down her window all the way, Isaacs then asked King to step out of the car. The video showed King asking the officer what law said that she must obey those orders. Isaacs told her she was being detained for a traffic infraction, and warned her he would break the window if she didn't comply.Isaacs then put his hand on the top of the window, which was rolled down about a quarter of the way. After he did that, Isaacs said King started to roll up the window on his arm, prompting him to shatter the car window."I forcefully pulled my arm back and broke the window due to the defendant's blatant disregard to all of the orders that were given to her, and her attempt to close the window on my arm," Isaacs wrote in an arrest affidavit.After shattering the window, Isaacs and another responding UCF police officer grabbed King's arms and took her out of the vehicle. Isaacs said King continued to resist arrest as they got her out of the car and put her in handcuffs.King was charged with battery on a law enforcement officer and resisting an officer -- one count of resisting with violence, and a second count for resisting without violence.She has since filed a formal complaint against Isaacs. In the video, King said she was bleeding.Isaacs also wrote in the arrest report that King told officers she was having a miscarriage, but after a medic arrived, it was discovered that King did not know for sure whether or not she was pregnant. King refused transport to a hospital, Isaacs said.UCF said it would not comment on the incident, since the investigation was ongoing.