By Breaking Celebrity News Staff

Every situation involving Casey Anthony seems to create a legal firestorm, and her recent interview with CNN's Piers Morgan is no exception.

Morgan had an off-camera interview  with Anthony earlier this week, drawing a massive outpouring of emotional reactions on the Web. That interview had now generated a letter from a lawyer warning the network and Morgan to back off, Breaking Celebrity News has learned exclusively.

Attorney Spencer Kuvin of the Florida law firm Cohen & Kuvin wrote that he represents an entity that reached an agreement to exclusively interview the notorious “Tot Mom,” who was acquitted of murdering her daughter Caylee.

Breaking Celebrity News has obtained the letter, in which Kuvin writes: "my clients held lengthy discussions with Ms. Anthony's counsel dating back to July 2011 wherein an agreement was made with respect to the exclusive worldwide rights to interview Ms. Anthony. My client believes that he has a binding agreement with Ms. Anthony for these rights.

EXCLUSIVE DOCUMENT: Read the Casey Anthony Letter Here

"If CNN, its producer, talent or any of its independent contractors have somehow tortiously interfered with this agreement we are demanding that you immediately cease and desist with our actions."

The lawyer also demands that CNN "immediately turn over any and all audio, video or other recordings of any interviews in your possession."

Breaking Celebrity News has learned exclusively that Kuvin's client, a group called Private Elevator Productions, does NOT have a writt