R.I. Gen. Laws § 12-9-17: Arrest without warrant.

The arrest of a person may also be lawfully made by any peace officer or a private person without a warrant, upon reasonable information that the accused stands charged in the courts of a state with a crime punishable by death or imprisonment for a term exceeding one year, but when so arrested, the accused must be taken before a judge with all practicable speed, and complaint must be made against him or her under oath, setting forth the ground for the arrest as in § 12-9-16; and thereafter after that his or her answer shall be heard as if he or she had been arrested on a warrant.