The arrest of a person may be lawfully made also by any peace officer or private person without a warrant upon reasonable information that the accused stands charged in the courts of a state with a crime punishable by imprisonment for a term exceeding one year. But when so arrested the accused shall be taken before a judge, magistrate or other officer authorized to issue criminal warrants in the Commonwealth with all practicable speed and complaint made against him under oath setting forth the ground for the arrest as in § 19.2-99, and thereafter his answer shall be heard as if he had been arrested on a warrant.