A top NYPD terror expert has been booted from his post after refusing an order to take federal files on Osama bin Laden from the FBI’s New York headquarters, The Post has learned.

Inspector John Nicholson, the former second-in-command of the NYPD’s Joint Terrorism Task Force, was transferred this week to Patrol Borough Brooklyn South after he defied the wishes of David Cohen, deputy commissioner of intelligence, according to law-enforcement sources.

Last week, after bin Laden was killed, Cohen told Nicholson to bring him the FBI’s latest dossier on him. But Nicholson refused his superior’s order, citing the federal agency’s policy of not allowing such documents to leave its office.

Nicholson, who has a background in Navy intelligence, will now oversee day-to-day crime-busting.

(Source: NY Post)