Warped internet creeps are celebrating the murder of a New York City mom and Blackstone executive who was gunned down in her lobby of her Manhattan office building.

Wesley LePatner, 43, was killed along with three others when crazed shooter Shane Tamura stormed 345 Park Avenue on Monday.

Tamura is believed to have been looking for the NFL offices which are headquartered in the building when he fatally shot married, mom-of-two LePatner as she was leaving work.

The senior manager was killed along with expectant father-of-three NYPD officer Didarul Islam, security guard Aland Etienne, and Rudin Management associate Julia Hyma before Tamura then turned the gun on himself.

Within hours of the massacre, social media was flooded with disturbing messages praising LePatner's death, describing it as 'cosmic justice' for her role in the housing market and branding her a symbol of corporate greed.