DARK DAY FOR BLACKWELL--Roger D. Blackwell arrives at the Federal Court House, for sentencing, in Columbus, Ohio, on Thursday, Dec. 15, 2005. The former Ohio State University economics guru was sentenced to six years in federal prison for his role in the 1999 Worthington Foods Inc. insider-trading scheme. (Jack Kustron/Photoj.com for Business First)

DARK DAY FOR BLACKWELL--Roger D. Blackwell arrives at the Federal Court House, for sentencing, in Columbus, Ohio, on Thursday, Dec. 15, 2005. The former Ohio State University economics guru was sentenced to six years in federal prison for his role in the 1999 Worthington Foods Inc. insider-trading scheme. (Jack Kustron/Photoj.com for Business First)