Former Israel President Moshe Katsav was convicted Thursday of raping an employee when he was a Cabinet minister, the most serious criminal charges ever brought against a high-ranking official and a case that shocked the nation.

Katsav, 65, faces a minimum of four years and up to 16 years in prison on two counts of raping an employee in 1998 when he was tourism minister. The Tel Aviv District Court also convicted him on lesser counts of indecent acts and sexual harassment involving two other women who worked for him when he was president.

Katsav served as a minister in several right-wing Likud governments before he was elected president in 2000. He claimed he was an innocent victim of a political witch hunt, suggesting he was targeted because he comes from Israel’s Sephardic community. Sephardic Jews, of Middle Eastern origin, were for decades an underclass. Katsav was born in Iran and immigrated to Israel as a child.

A somber Katsav left the courtroom without commenting, surrounded by his high-powered legal team. He was ordered to surrender his passport while awaiting sentencing at a date that has not yet been set. His son Boaz vowed his father would clear his name.

The conviction was the latest in a series of high-profile cases against Israeli officials.

Former Israeli Finance Minister Avraham Hirchson is currently in prison after being convicted of embezzling more than $600,000 from a workers union. Former Justice Minister Haim Ramon was convicted in March 2007 of forcibly kissing a female soldier. Former Prime Minister Ehud Olmert is currently standing trial on corruption charges.