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Two years after a gunman shot Rep. Gabrielle Giffords in the head, documents about his case remain under government seal.

The Associated Press reports that three news organizations — The Washington Post, KPNX-TV in Phoenix and Phoenix Newspapers Inc., which publishes the Arizona Republic, want U.S. District Judge Larry Burns to unseal any remaining documents in the case, as well as release redacted information that is no longer required to be secret.

Giffords, a Democratic member of Congress, was shot in the head Jan. 8, 2011, by Jared Lee Loughner during a meet-and-greet outside a Tucson supermarket. Loughner, who pleaded guilty to 19 federal charges to avoid the death penalty, killed six people and wounded 12 other people.

Giffords resigned from Congress and is recovering from her injuries.

The Pima County Sheriff's Office has released around 2,700 pages of documents, but at least four remain sealed, the Associated Press reported. The news organization argue that Loughner's fair-trial rights are no longer at risk, and the information should be released.

Prosecutors have asked permission to take until May 8 to file their response to the request.