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.

An Impractical Joker & Post Malone almost got arrested

Joker': Police shut down opening night screenings after threat

Joker' impersonator, who talked about killing people on Facebook

Smith County Sheriff's Office welcomes newest officer, Joker

How The Joker Widens Discussion On Gun Control And Mass Shooting

Police arrest sword-wielding man dressed as the Joker

Law Enforcement Seizes Joker's Stash — Stolen Credit Card Marketplace

Report: Man claiming to be Joker threatens Santa Rosa County

Lawmaker worries 'Joker's Law' could carry harsher penalty for

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