The 27-year-old maniac who killed four people at a Midtown Manhattan office tower had two outstanding “unresolved” background checks that the Nevada Point of Contact Firearms Program never settled, officials said.

Gunman Shane Tamura stormed into the 44-story office building in Midtown Manhattan on July 28 and sprayed more than 50 rounds between the lobby and the 33rd floor.

During the rampage, Tamura gunned down a Blackstone executive , an NYPD officer , and a security guard in the lobby. On the 33rd floor, he killed the youngest victim, a 27-year-old Cornell graduate , before turning the gun on himself. 3

The assault rifle he used during the shooting was purchased from his boss at the Horseshoe Las Vegas casino, who completed the sale under the supervision of a gun

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