"Couldn't find the cowboy and Indian!!!" read the Facebook photo caption. "Got em now!"
The event had "close to 100" attendees, according to the person who flagged the photos to BuzzFeed Canada. She preferred not to be named due to the small size of the law enforcement community in the St. John's area.
"That's pretty bad that not only did they have these costumes at your their event but then they also displayed them publicly on Facebook," she said.
"It's almost like they didn't realize how terrible it was that people did that."
The photos were removed from Facebook after BuzzFeed Canada contacted NL LETR for comment.