The San Francisco Police Department has quietly fired a veteran inspector - the first officer to be dismissed from the force in more than four years - for a litany of misconduct that included lying about an incident in which Antioch police fired a Taser at her.

Inspector Marvetia "Lynn" Richardson, 42, was fired after a closed-door hearing of the Police Commission last month, but the panel made no announcement at the time. City officials confirmed Richardson's firing in response to inquiries from The Chronicle.

Richardson worked for the department for 15 years, most recently in the fraud unit. She had been suspended without pay since 2008, when then-Chief Heather Fong accused her of 11 disciplinary infractions.

Three of the counts stemmed from a June 2007 incident in which an Antioch police officer used a Taser to subdue her in her home on the city's Mokelumne Drive.

Officers were answering a call about someone making threats at Richardson's home. When they arrived, Richardson allegedly ordered them to leave, became belligerent and refused commands to show her hands, prompting the officers to use the Taser, according to the department's charges. She also refused to sign a citation for allegedly resisting arrest.

In November 2008, Richardson sued the Antioch police chief, the officers involved and the city, saying they had violated her civil rights by using the Taser wrongfully. The case is scheduled to go to trial in federal court in San Francisco this fall.

Before she filed her suit, however, San Francisco police officials concluded Richardson had lied about the incident in explaining it to the department's internal affairs unit.

Richardson, they said, told internal investigators that Antioch officers had never warned her they were intending to fire the Taser. They said an audio recording made by officers on the scene contradicted her story.

The department also accused her of misusing the police records system in 2007 to track down and send a letter to a woman, telling her that her husband was cheating on her. Richardson apparently was interested romantically in the woman with whom the husband was having the affair, according to the disciplinary charges.

The husband intercepted the letter and filed a complaint with the city.

Other charges alleged that Richardson had negligently cashed several stolen checks given to her by her tenant as rent, amounting to a total of nearly $26,000. The tenant stole the checks from his parents, according to the charges.

Richardson said she did not know the checks were stolen, but the department maintained that as a fraud investigator she should not have accepted checks from a third party.

Richardson was also accused of sick time abuse. She allegedly called in sick 29 times over the course of a year but failed to file paperwork that would ensure the time off was recorded as sick leave.

Quinton Cutlip, an attorney for Richardson, has argued that some of the charges were unfounded and others were lodged too late to comply with the one-year statute of limitations for disciplinary cases. He did not return calls last week seeking comment.

Richardson also did not return calls seeking comment. She is the first San Francisco police officer to be fired since Officer Anthony Nelson was dismissed in October 2005, after he was found to have lied about his use of force on an anti-war demonstrator whose arm he broke during a 2003 demonstration.