Idaho Code § 19-1802
The application must be made in open court and in writing, verified by the affidavit of the defendant, a copy of which must be served upon the prosecuting attorney at least one (1) day before the application is made. Whenever the affidavit shows that the defendant can not safely appear in person to make the application, because the popular excitement against him is so great as to endanger his personal safety, and such statement is sustained by other testimony, the application may be made by counsel, and heard and determined in the absence of the defendant, though he is indicted for felony, and has not at the time of such application been arrested, or given bail, or been arraigned, or pleaded or demurred to the indictment.
Idaho Code § 19-1802