Sam, along with his father Buddy, were the first people to discover the crashed Yautja ship near the town, and were subsequently impregnated by Facehuggers. They died with the Chestbursters inside them hatched, becoming the first victims of the Xenomorphs and heralding the start of the infestation.
In October 2004, Sam and his father, Buddy Benson, were hunting a deer with Remington 700 sniper rifles when a Yautja Mother Ship crashed in the forest near their location. The two ran towards the ship, amazed by it. After briefly inspecting the ship, Sam and his dad turned around to go notify the sheriff, Eddie Morales, but were chased by Facehuggers escaping from the ship. Sam tripped while running, allowing the escaped Facehuggers to catch up to them. Sam watched his father get attacked and subdued by a Facehugger before being subdued by one himself. Later, after the Facehuggers fell off and died, the two woke. Buddy's Chestburster quickly erupted and Sam's also erupted soon after.