Between 1996 and 2003 further 5500 authorizations were given related to organized and white-collar crime; out of these 5500 suspects, only 238 were convicted.
His practice focused on business and white-collar crime matters, complex civil cases, internal corporate investigations, and corporate compliance programs.
He was a sociologist of the symbolic interactionist school of thought and is best known for defining white-collar crime and differential association, a general theory of crime and delinquency.
The white-collar crime involves people making use of their occupational position to enrich themselves and others illegally, which often causes public harm.