Samuel Mullet Sr. is arguing in an appeal filed Friday that his former attorney made a series of mistakes during the trial and in his previous appeals.
His former attorney said in court documents that he did make errors handling the case.
The U.S. Supreme Court decided last year not to review Mullet's appeal challenging the constitutionality of the federal hate crimes.
Prosecutors say Mullet directed the hair-cutting attacks. Hair and beards have spiritual significance in the Amish faith.
Mullet is serving an 11-year sentence. The fifteen other members of the eastern Ohio Amish community convicted in the case have since been released.
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