Background: Jeanine Ferris Pirro (born June 2, 1951) is an American TV personality, former judge, prosecutor, and Republican politician in New York. Pirro is currently the host of Fox News Channel's Justice with Judge Jeanine. She was the first female judge elected to the Westchester County Court prior to her election as the first female District Attorney of Westchester County. As District Attorney, Pirro gained considerable visibility in cases of domestic abuse and crimes against the elderly.
Context: In 1975, Carl Vergari appointed Pirro to the position of Assistant District Attorney of Westchester County, where she began her career by writing appeals and handling minor cases. In 1977, Pirro approached Vergari and requested that he apply for a federal grant for local district attorney's offices to establish bureaus that specialized in domestic violence. She hoped that Vergari would take advantage of potential funding as well as a 1977 change in New York law that moved many domestic violence cases from family court to criminal court. Vergari agreed to apply, and his office became one of four in the nation to win the grant. In 1978, he appointed Pirro to be the first chief of the new Domestic Violence and Child Abuse Bureau. Pirro was known to be an aggressive bureau chief. Due to possible coercion, she had a strict policy against dropping cases at a victim's request.  Many people praised Pirro for her passion as Domestic Violence Bureau Chief, but she attracted increasing criticism from colleagues due her attention-grabbing behavior and violations of tradition. On multiple occasions, Chief District Attorney Vergari spoke to Pirro concerning her violation of office policy. She had issued press releases with her own name--and not Vergari's--on top. The relationship between Pirro and Vergari disintegrated in the late 1980s, after Pirro claimed sole responsibility for the establishment of the Domestic Violence and Child Abuse Bureau.  On June 1, 1990, just five months prior to Pirro's first appearance on the ballot for County Court Judge, she attracted widespread attention and some criticism for rushing to conduct a bedside arraignment of Maria Amaya at the Intensive Care Unit of United Hospital in Port Chester. Amaya had been charged with four counts of second-degree murder for the deaths of her four children. She was a 36-year-old immigrant from El Salvador who had a history of being hospitalized for mental issues. Amaya had killed the four children and attempted suicide after believing that they were being corrupted by drugs and sex.  Vergari had served as district attorney for Pirro's entire tenure as an assistant district attorney and her time on the bench. In 1999, he critiqued Pirro as "bright and capable" and someone who "plays hardball seeking publicity" but is also "very self-centered in everything she does".  During a 1986 abortive campaign for lieutenant governor, Pirro claimed to have never lost a case in "about 50 trials". This number was disputed when presented in 2005 to colleagues, who said that the real number of trials personally handled by Pirro "wasn't more than 10". Pirro's then-spokesman, Anne Marie Corbalis, contended only that Pirro had a "100% felony conviction rate" as an Assistant District Attorney.
Question: How long did she serve as ADA?. Whats the answer?