Timothy S. Durham, the onetime chief executive officer of National Lampoon (NLMP) Inc., was sentenced to 50 years in prison for defrauding investors in an unrelated company he partly controlled. “I found no sincere remorse,” U.S. District Judge Jane Magnus-Stinson in Indianapolis said today before imposing punishment on Durham, 50. She said the former Fair Finance Co. CEO exhibited deceit, greed and arrogance.