Rockstar has a new $4 case for L.A. Noire players to solve, and it'll be out next week. Along with the official trailer, here's the official summary:

"Nicholson Electroplating" is a downloadable case from the Arson desk available for the Playstation 3 and Xbox 360. At 9.45 in the morning, a thunderous explosion rocks Los Angeles. City blocks are flattened and smoke and ash fill the air. Detectives Phelps and Biggs race to the site of the former Nicholson Electroplating plant to find a pile of unanswered questions. What caused the explosion? What were Nicholson's employees working on? And where are chief chemist Dr Harold McLellan and hismysterious female assistant?"

I'm intrigued by the mention of Howard Hughes in the trailer, but it's not clear if he's actually going to show up.

The case will be available for download on June 21. If you bought the $10 L.A. Noire Rockstar Pass, this is part of the discount bundle you paid for—you won't have to purchase it again a la carte.