An ex-girlfriend of Israeli entertainer and TV personality Dudu Topaz is suspected of extorting money from him in exchange for her silence on his involvement in the recent attacks on media executives, police revealed Tuesday. Topaz confessed earlier this month to hiring men to assault media executives who rejected his ideas for television programs. Shira Margalit, deputy director-general of the Reshet television network, Avi Nir, director-general of the Keshet network, and actor's agent Boaz Zion have all been the victims of previously unexplained attacks by groups of men. Police also believe Topaz planned on attacking Amos Regev, editor of the Yisrael Hayom newspaper, who turned down Topaz's idea for a column. Yaakov Lappin contributed to this report.