In a nondescript office tower just west of downtown Hartford, an obscure law enforcement unit of local, state and federal authorities has played important roles in the biggest crimes in the state and country.

The Connecticut Intelligence Center, led by state police officials, helped with the investigations into the shooting massacre at Sandy Hook Elementary School in Newtown in 2012, the failed plot by a Bridgeport man to blow up a vehicle bomb in Times Square in 2010 and a car chase involving a Stamford woman who tried to ram her vehicle through a White House barrier in October.