Alfred Hitchcock Presents

Sam Pine's son is dies when a road hog prevents him from getting his son to the hospital in time. Sam invites the roadhog over to his house. He gives him a drink and tells him its poisoned. The roadhog takes off intedning to drive to the hospital. Sam's other son's drive in slowly in front of him and prevent him from passing. When the road hog tries to pass, he crashes and dies. Later Sam reveals that the drink wasn't poisoned at all.