In the final fight with the main antagonist, he turns back into a complete werewolf during the day. Werewolves only become werewolves at night during the full moon.
Just before the first fight Barlow says "I see you got my invitation." In reply the leader of the werewolves takes a bloody sack from over his shoulder and throws it towards Barlow. The next shot shows a head hitting the ground, no sign of the sack. There's no way given how the sack was wrapped and the way it was thrown that the head could have gotten out of the sack.