§ 423. Peace officers and their duties. The officers and members of
the state police, any local police department and any peace officer
acting pursuant to his special duties shall have and exercise the power
and it shall be their duty to investigate and make arrests for
violations of the provisions of this chapter. They shall investigate any
theft of a motor vehicle or trailer, of which they receive notice or
have information, and arrest or cause the arrest of any person where
reasonable grounds exist to believe that such person has stolen a motor
vehicle or trailer, and, when necessary for such arrest, make complaint
on information before the proper court or magistrate.