A federal appeals court will reconsider the case of an Arizona man accused of planning a massacre at the 2008 Super Bowl before changing his mind.

Kurt Havelock was convicted in 2008 of mailing threatening messages, but a three-judge panel of the 9th U.S. Circuit Court of Appeals overturned the conviction last year.

The panel's decision is now void, and the full 11-judge court will consider the conviction anew.

Authorities alleged that Havelock bought an AR-15 semiautomatic rifle and 200 rounds of ammunition, and wanted to kill people at the 2008 Super Bowl in Glendale.

The documents say Havelock was armed when he reached a parking lot near University of Phoenix Stadium but had a change of heart.

Havelock called his parents, who persuaded him to turn himself in.