National Police Service Spokesman George Kinoti said the headquarters had received the letter but could not immediately comment on the decision and action to be taken.
Ms Waiguru said in the last several months, there had been an orchestrated drive to link her with a spate of theft and corruption at the ministry and some its departments, especially the National Youth Service.
She also attributed the threats to an affidavit she swore detailing how senior politicians and their associate were involved in the mega theft at the NYS. Ms Waiguru adversely mentioned Mr Duale and Elgeyo-Marakwet Senator Kipchumba Murkomen in her affidavit.
Mr Duale threatened to sue her, adding that he would “take a sabbatical to go after Waiguru”.
“Other senior politicians have also accused me of breaking the Jubilee coalition,” she added. She, however, maintained that she was cleared by the Ethics and Anti-Corruption Commission.
“Soon after, a fraudulent and false affidavit was sworn by one of the persons charged with the theft… making wild allegations. I’m convinced that this is the work of masterminds of the thefts at the NYS,” she added.