Groups of those murdered while viewing a Batman film in 2012 have kept in touch with Warner Bros with worries about the new Joker film and encouraging the studio to join activity against weapon brutality.
Twelve individuals kicked the bucket in a film demonstrating The Dark Knight Rises in Colorado.
They included Jessica Ghawi, 24, whose mother Sandy Phillips revealed to BBC News she was “alarmed” by the Joker trailers.
Warner Bros said the film – which stars Joaquin Phoenix – was not a support of certifiable brutality.
Phoenix left an ongoing meeting when gotten some information about the issue.
Sandy Phillips and her better half, Lonnie, who run Survivors Empowered, an enemy of firearm brutality gathering, kept in touch with Warner Bros alongside three others whose relatives were executed, harmed or got up to speed in the 2012 shooting.
Addressing BBC News, Mrs Phillips stated: “When I originally observed the trailers of the film, I was totally appalled.
“And afterward when I burrowed somewhat more profound and discovered that it had such pointless savagery in the motion picture, it just chilled me to my bones.
“It just irritates me that a noteworthy film organization isn’t assuming liability and doesn’t have the worry of people in general by any stretch of the imagination.”
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The families’ letter stated: “When we discovered that Warner Bros was discharging a motion picture considered Joker that exhibits the character as a hero with a thoughtful birthplace story, it gave us delay.
“We bolster your entitlement to free discourse and free articulation. Yet, as any individual who has ever observed a comic book motion picture can let you know: with extraordinary power comes incredible duty. That is the reason we’re approaching you to utilize your monstrous stage and impact to go along with us in our battle to manufacture more secure networks with less weapons.”
The letter approached the studio to campaign for weapon change, help finance survivor assets and firearm savagery mediation plans, and end political commitments to competitors who take cash from the National Rifle Association.