W.R.Cr.P. 18
Rule 18. Place of Prosecution and Trial
Except as otherwise permitted by statute or by these rules, the prosecution
shall take place in the county in which the offense is alleged to have been
committed, or in the municipality whose ordinance is alleged to have been
violated. The court shall fix the place of trial with due regard to the
convenience of the defendant and the witnesses and the prompt administration of justice.