GALLATIN, Tenn. -- A number of internal investigations at the Gallatin Police Department have resulted in the resignations of several officers.

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Another officer resigned Wednesday, this time over an investigation into the improper use of a Taser gun.

Officer Angie Negrin had a hearing last Friday, but before any action could be taken, she resigned.

“We hold high standards for our police officers and we’re holding them accountable. Citizens have every right to expect the highest standards out of their police,” said Gallatin Mayor JoAnn Graves.

Negrin is the sixth Gallatin officer to resign after internal investigations revealed things such as not reporting questionable incidents, serious errors in judgment and allowing officers to watch pornographic material and pass around nude images around the police department.

Negrin’s personnel file reveals that she received verbal warnings over an incident where a citizen complained that she was rude and yelling during a traffic stop. Another incident was reported that Negrin sprayed a resident with pepper spray then refused medical assistance to the person after 22 requests.

Also included in Negrin’s file are 16 commendations that cite her for everything from arresting robbers to her performance during the tornado of 2006.

Gallatin Police Chief John Tisdale has said in the past that he would not tolerate any inappropriate behavior by officers, and Graves agreed.

“I support Chief Tisdale’s efforts to make sure that he has the best officers working for him,” she said.

Negrin did not return phone calls.