A Best Buy flier contains information about a previously unannounced DLC case for Rockstar's L.A. Noire.
An observant reader named Steven sent a scan to Joystiq, which broke the news. As you can see in the picture below, a Best Buy location is advertising that the first 16 customers who buy the game at a midnight store launch will get a code to unlock a DLC pack entitled "Nicholson Electroplating Arson Case." It also says "when it releases," without providing a date for the DLC. As it's already been reported that many cases were cut from the final version of the game, it's clear that many of them will likely surface as later DLC.