[4] John Dunsworth's daughter Sarah Dunsworth-Nickerson (who plays a character with the same first name), tweeted that her father's real voice was used in the animated series.

In his youth, he was an idealistic police officer, but since his wrongful dismissal as a result of a prank by Julian, Ricky, and Bubbles on Halloween 1977, he degenerated into a bitter alcoholic.

Lahey bears a grudge against Ricky and Julian; having been forced to watch them grow from childhood troublemakers to full-fledged criminals, he considers them to be the greatest threat to the safety and stability of the park.

He spends most of the series trying to interfere with the Boys' illegal schemes and have them thrown back in jail for reasons many believe are that of the jealous type, often neglecting his real, rather mundane duties as trailer-park supervisor.

For example, he leverages Julian's emotional attachment to his grandmother's trailer to blackmail him; in another instance he cunningly employs Cyrus and his partners to attack them.

Throughout the series, he anthropomorphizes alcohol itself, reverently referring to it as 'The Liquor', a quasi-supernatural entity he often relies on to aid him in foiling the protagonists' plans.

In Season 2, the Boys help Lahey secure his position as trailer park supervisor after he is at risk of losing it to their nemesis Sam Losco.

In exchange for Bubbles' testimony, Lahey forms a peace treaty with the Boys in which he turns a blind eye to their illegal activities.

This treaty is largely upheld throughout most of Season 7, but it unraveled after Lahey, who relapsed back into alcohol, attempts to arrest the Boys after learning that Bubbles is wanted in the United States for stealing a model train with a $50,000 reward.

He is killed off in the first episode ("Long Story Short... A Bear Ripped My Cock Off and Ate It") of the animated series after a Shit Hawk flew off with him.