Jerry Sandusky is arguing his former defense lawyers didn't properly represent him and wants a do-over of the 2012 trial that produced a 45-count conviction for child sexual abuse.
A judge in central Pennsylvania on Thursday heard more testimony in the former Penn State assistant football coach's multi-hearing appeal.
The latest witnesses include one of the victims who testified against Sandusky. He says his memories of the abuse changed in part because of therapy and counseling.
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A witness for Sandusky was a psychology professor who specializes in human memory.
A lawyer who represented Sandusky in earlier appeals also took the stand.
The 73-year-old Sandusky is appealing while he serves 30 to 60 years in prison.
The judge says he hopes to rule by summer's end.