A judge in New Orleans says prosecutors don't have to give real estate heir Robert Durst a series of six handwriting comparisons involved in the California murder case against him.

Durst's lawyers say they need the analyses to fight his arrest, but U.S. Magistrate Judge Sally Shushan ruled Monday that court records already include a document summarizing the history of the handwriting comparisons. She said that's enough.

The first analysis said someone else probably wrote a note that directed police to the slain body of Susan Berman, but three later comparisons said Durst was probably the writer.

Durst is charged with possessing a handgun after a felony conviction. The charge has kept him in Louisiana even though he waived extradition on the murder charge in Los Angeles.