Former optometrist David Matusiewicz, his mother, Lenore, and sister Amy Gonzalez will be in federal court October 9th of next year,
All three face charges of conspiracy and stalking David's ex-wife Christine Belford who died in the courthouse shooting.
Belford and her friend were shot to death in February by Belford's former father-in-law, Thomas Matusiewicz, who then turned the gun on himself.
Matusiewicz's family denies knowledge of any plan to murder Belford.
(The Associated Press contributed to this report.)
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