The jury deliberated for two and a half days after the 13-week trial stemming from the attack, in May 1993.
The trial, delayed three times already, stems from a street brawl on Halloween.
The trial stems from a case fraught with racial animosity.
The little-noticed trial stems from a patent-infringement case that began in 1990.
Mr. Grant still faces another trial stemming from the same inquiry.
Three other defendants were convicted of manslaughter for his death in another trial stemming from the incident.
The trials stemmed from a major Federal investigation into judicial corruption in Chicago.
The sharply contrasting assessments came on the final day of arguments in a trial stemming from a March 1990 episode.
A man considered a leading securities expert became the first lawyer to lose a major criminal trial stemming from the recent Wall Street scandals.
The trial stems from the death of Michael Griffith, 23 years old, of Brooklyn.