The duo is believed to be behind the incidents that happened on the Baltimore-Washington Parkway between 1-5 p.m. on May 20, police said. The male suspect was reportedly armed with a handgun as well.
The suspected vehicle is a four door black Ford Fusion sedan, police said. Anyone with information is asked to contact police at 202-379-4877 or email USPP_Tipline@nps.gov. Tips can remain anonymous.
Click here to follow Daily Voice Gaithersburg and receive free news updates.