https://www.vice.com/en_us/article/4avjwg/tiktok-cosplayer-killed-friend-while-pretending-to-be-batman-villain

A TikTok cosplayer with 1.6 million followers was charged with manslaughter after allegedly shooting her friend in a terrible drunken incident in January while likening herself to the Batman villain Penguin. Since being released on bail, Mary Anne Oliver-Snow, who goes by the name Yandere.freak on TikTok, has continued to post cosplay videos, including some that use fake blood. 

According to court filings and a police report, Oliver-Snow “did then and there unlawfully, recklessly cause the death of Helen Rose Hastings by pointing a handgun at the complainant and pulling the trigger.” The incident was first reported by Dexerto.