Rhode Island General Laws Title 12. Criminal Procedure § 12-16-4. Issuance of summons to appear in another state

If at a hearing the judge determines: (1) that the witness is material and necessary, (2) that it will not cause undue hardship to the witness to be compelled to attend and testify in the prosecution or a grand jury investigation in the other state, and (3) that the laws of the state in which the prosecution is pending or grand jury investigation has commenced or is about to commence will give to him or her protection from arrest and the service of civil and criminal process, the judge shall issue a summons with a copy of the certificate attached, directing the witness to attend and testify in the court where the prosecution is pending or where a grand jury investigation has commenced or is about to commence at a time and place specified in the summons. In any hearing the certificate shall be prima facie evidence of all the facts stated in it.