Idaho Code § 19-4503
No demand for the extradition of a person charged with crime in another state shall be recognized by the governor unless in writing, alleging, except in cases arising under section 19-4506, Idaho Code, that the accused was present in the demanding state at the time of the commission of the alleged crime, and that thereafter he fled from the state. Such demand must be accompanied by a copy of an indictment or by information supported by affidavit of probable cause, judicial finding of probable cause, or plea of guilty, as reflected in any document from the court in the demanding state, or by affidavit made before a judge or magistrate, together with a copy of any warrant which was issued thereupon, or by a copy of a judgment of conviction or sentence imposed in execution thereof, together with a statement by the executive authority of the demanding state that the person claimed has fled the state after being charged with a crime, escaped from confinement, or has broken the terms of his bail, probation or parole. The indictment, information, or affidavit made before the judge or magistrate must substantially charge the person demanded with having committed a crime under the law of that state, and the copy of the indictment, information, affidavit, or judgment of conviction or sentence must be authenticated by the executive authority making the demand.
Idaho Code § 19-4503