While President Moshe Katsav, at the center of a firestorm of allegations and counter-allegations, went on a family vacation Sunday, police investigators began to prepare for a top-level meeting to discuss his case. Police Insp.-Gen. Moshe Karadi and Attorney-General Menahem Mazuz were expected to meet Monday to discuss the evidence. Over recent weeks, police have been investigating claims by Katsav that one of his former employees was attempting to blackmail him, and contradicting claims by the employee, known as A., that the president engaged in sexual contact with her while she worked at Beit Hanassi. According to police sources, Katsav is to undergo more questioning similar to the sessions last Wednesday and Thursday. The special investigative team led by Lt.-Cmdr. Yoav Segelovich and acting under the auspices of the International Serious Crimes Unit is sifting through the testimony and evidence. Police sources did not rule out the possibility that Katsav would be asked to undergo a polygraph test. Retired Supreme Court justice Mishael Cheshin on Sunday suggested that Katsav should abstain from his formal duty of swearing in Justice Dorit Beinisch as the next Supreme Court president. Katsav traveled to the North on Sunday, after being told by police he would not be questioned over the next few days. He was accompanied by his wife, children and grandchildren.