A federal court judge in December rejected plea deals for 20-year-old Shawn Christy and his father, Craig Christy, and ordered them to stand trial.
Craig Christy is set for a plea change hearing Friday. His wife, Karen Christy, says her son indicated he intends to also plead guilty without a deal with prosecutors.
The Christys were arrested in Pennsylvania in August. Prosecutors say the men were upset about state restraining orders issued on behalf of former Alaska Gov. Palin, the 2008 Republican vice presidential candidate.
The restraining orders were issued after Palin left office.
