Video of shark spotted by Troopers Fairchild and Boulos, who are assigned to the Air Wing. They also had Provincetown Police Detective Rich Alves on board when they all spotted the shark about 30 yards off the Race Point Beach in Provincetown. They alerted beachgoers using the helicopters P.A. system to exit the water due to the proximity of the shark to the shore.
Video by Mass State Police
Meanwhile, Ariana, a beachgoer at Race Point captured this: (strong language)
Shark chomping on a shark at Race Point in Provincetown, MA 8/16/18 from Cape Wide News LLC on Vimeo.