Speaking on a Birmingham radio show, Gallion accused Fulmer of ''hypocrisy'' and telling a ''pack of lies'' in his testimony to the NCAA regarding the investigation.
Fulmer declined comment on the charges, citing the ongoing federal investigation.
Gallion claims Fulmer was among three secret witnesses who provided crucial testimony in the NCAA's case against Alabama. The Tide ultimately incurred five years' probation, the loss of 21 scholarships and a two-year bowl ban.
Gallion also maintains he has copies of documents showing that Fulmer (A) alleged that former Tide running back Shaun Alexander received improper benefits and (B) accused a former Alabama assistant of having an affair with a recruit's mother.
Gallion represents Ivy Williams and Ronnie Cottrell, two Tide aides who were fired in 2000.