More details should arise soon.

http://www.worldcarfans.com/110031225084/all-new-2012-ford-taurus-interceptor-police-car-revealed

and here:
http://www.fordvehicles.com/fordpoliceinterceptor/?CID=11PI


Ford also dropped hints on an all-new Police Interceptor utility vehicle. Ford says it will complement the new Police Interceptor sedan.

That all-new "Police Interceptor utility vehicle" is likely the upcoming 2011 Ford Explorer (known internally as the U502)