Joker' Puts Law Enforcement on Alert

The LAPD plans to increase its visibility at theaters when "Joker" opens, amid law enforcement concern about the Warner Bros. film.

Wanted federal offender appears to mock Toronto police on TikTok

Police Mistakenly Send Batman-Themed Alert About Joker's Car

Missouri Police Accidentally Issue Emergency Alert Warning Locals

Man dressed as Joker arrested for making terror threats, police

Outside Joker which Phantom Thieves would survive the best in jail

FDNY EMS Told to Prepare as ˜Joker' Hits Theaters - JEMS: EMS

Man arrested in Florida would dress as Riddler, Joker to spew

Review: Joker, Opinion

Cyber security efforts turn proactive after sophisticated attacks

Review: Joker, Opinion

Security stepped up as 'Joker' opens in US movie theatres

Why is a literal batman reference being sent out as an emergency

Joker' Costumes Banned in Theatres, Fans Tense as US Military