In his first appearance he lets Kay and Jay into the morgue. Later, he starts killing flies in front of Edgar, an alien bug. Edgar gets mad, and on a return visit, Kay begins to light a cigarette. But, his match goes out from slime from the ceiling. He looks up, and Newton is slimed to the ceiling; it is not said what happened. He returned with a slightly bigger role in the second movie.
In the second movie, Kay and Jay find out that he rented a Mysteries in History video on an alien event that Kay was a part of. Here, Newton lives with his mom and his girlfriend Hailey. He believes highly in aliens and the MiB, possibly due to what happened before. After watching the movie, he is neuralyzed and told to get contacts, move out, take Hailey out for a nice lobster dinner, and to pay more than a dollar for the dinner. They agree to go to Cambodia, and Newton grabs a shovel and starts downstairs to his mom.