JUST IN: The building that Thomas Crooks climbed on top of and fired from was the staging area for the police tactical team according to ABC News.

Holy sh*t.

"The building where gunman Thomas Crooks scrambled onto the roof and opened fire was the staging area for the local police tactical team doing overwatch of the crowd, two law enforcement officials told ABC News."

Investigators are trying to figure out how Crooks was able to get roof access.
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