Vice Attorney General Dina Zilber rejected on Sunday a claim by lawyer to Prime Minister Benjamin Netanyahu, Yossi Cohen, who said the police investigations of the Netanyahu's [Benjamin and his wife Sara] are tainted due to the involvement of former head of Lahav 433 Roni Ritman. Ritman was dismissed from the force due to inappropriate sexual conduct. In a letter, Zilber said that the argument the investigations were biased is unacceptable.