Police are investigating "Kill your CEO" graffiti spray-painted in white on multiple businesses over the weekend in Chicago, WLS-TV reported.The vandalism comes after the targeted, fatal shooting last Wednesday of Brian Thompson, the CEO of UnitedHealthcare, in New York City, the station said.'F*** him may he rest in piss.'As you might guess, it wasn't an isolated case.WLS in a related report said a New York Police Department bulletin was issued Tuesday warning of increased risk for health care executives and the possibility of copycat perps.The station, citing the bulletin, said online posts have listed the names and salaries of several health insurance executives, multiple "Wanted" flyers highlighting corporate executives have been posted throughout Manhattan, and social media users continue to celebrate Thompson's death.WLS said many social media posts have heralded shooting suspect Luigi Mangione as a "martyr" — and the NYPD encouraged companies to increase precautions and security for executives since Thompson's fatal shooting could "inspire a variety of extremists and grievance-driven malicious actors to violence."According to the station, the NYPD bulletin said "both prior to and after the suspected perpetrator's identification and arrest, some online users across social media platforms reacted positively to the killing, encouraged future targeting of similar executives, and shared conspiracy theories regarding the shooting."WLS said the bulletin called out a viral social media post listing the names and salaries of eight health insurance company CEOs and that some online users viewed it as "a hitlist and that CEOs should be afraid."The station added that the "Wanted" posters in Manhattan showed images of corporate executives and bullet-shaped graphics warning, "UnitedHealthcare killed everyday people for the sake of profit. As a result Brian Thompson was denied his claim to life. Who will be denied next?" and "Wall Street CEOs Should Not Feel Safe, Deny, Defend, Depose." Bullet casings found at the scene of Thompson's killing in front of a Manhattan Hilton hotel apparently were inscribed with words such as "delay” and “deny" which reportedly refer to health insurance claim denial tactics.WLS added that the bulletin also included examples of online users saying Thompson deserved to be murdered due to his role in the health insurance industry, such as: "My mom was denied chemo multiple times and suffered tremendously they missed her cancer for two years because she was constantly denied... she will have life altering damage because of it. F*** him may he rest in piss."Blaze News previously reported that just hours after Thompson was fatally shot, controversial, polarizing former Washington Post writer Taylor Lorenz posted online, "And people wonder why we want these executives dead."What's more, Lorenz doubled down on her comments, telling Piers Morgan of "Piers Morgan Uncensored" on Monday that she "felt, along with so many other Americans, joy" upon learning of Thompson's slaying.Glenn Beck, co-founder of Blaze Media, wrote an op-ed the day after Thompson's death that his killing "highlights a rising tide of anti-institutional rage" and that we have a choice "about whether we will uphold the principles of justice or descend into chaos."Like Blaze News? Bypass the censors, sign up for our newsletters, and get stories like this direct to your inbox. Sign up here!