PITTSBURGH (AP) — A high-profile entrepreneur once sentenced to eight years in prison for a landmark fraud case has pleaded guilty to obstructing efforts by the Internal Revenue Service to collect more than $6.2 million in unpaid taxes, penalties and interest.

Michael Carlow, of Upper St. Clair, was indicted in 2011 on charges he conspired with his girlfriend to defraud the IRS to avoid paying taxes and penalties associated with his 1996 conviction in a check-kiting scheme, which cost PNC Bank more than $31 million.