Party's Over: Tyco's Kozlowski Evidence Files

Dennis Kozlowski, once described as "The Most Aggressive CEO in America," now sits behind bars. A poster boy of excess, the former CEO of Tyco stole millions from his company, using the money for a lavish party, a gilded shower curtain and expensive art.

The son of a transit authority cop, Kozlowski was the first in his family to attend college. He attends Seton Hall University in New Jersey, where he majors in accounting. Kozlowski works his way through college by waiting tables and playing guitar in a band. (Source: Seton Hall University)

Dennis Kozlowski is a rock star CEO during the go-go economy of the late 1990s. At that time, he's lauded for taking dull little Tyco, a conglomerate that cranks out everything from medical supplies to fire sprinklers, and creating a brand name that's making its stockholders rich.

Dennis Kozlowski uses no-interest loans from Tyco to build this mansion in Boca Raton, Florida. He lives a rich lifestyle. He rises to the top of Tyco and in one year makes a staggering $170 million in compensation. (Source: Dan McDougall)

In court, prosecutors show how Kozlowski spent the money he stole from Tyco to furnish a Fifth Avenue apartment and to purchase more than $13 million worth of paintings. Dennis Kozlowski paid nearly $4 million for this work by Monet. (Source: AP Images)

Dennis Kozlowski paid $4.7 million for this work by Renoir. In an elaborate ruse, he illegally evades more than one million dollars in sales tax on purchased art. The tax dodge would eventually be his downfall. (Source: AP Images)

This is the Colorado ski chalet Dennis Kozlowski once owned.(Source: Toni Axelrod Photography)

In 1998, Dennis Kozlowski pays $15 million for the Endeavour, which competed in the 1934 America's Cup. (Source: Tim Wright)

In September 2002, Manhattan District Attorney Robert Morgenthau announced charges against Dennis Kozlowski and his CFO Mark Swartz for looting $170 million from Tyco. (Source: AP GraphicsBank)

In September 2005, Mark H. Swartz, former CFO of Tyco, was sentenced to 8 1/3 years to 25 years in prison. (Source: New York State Department of Correctional Services)

In September 2005, Dennis Kozlowski, former CEO of Tyco, was sentenced to 8 1/3 years to 25 years in prison. Now a convicted felon, Kozlowski says he's innocent... his only crime, making too much money and drawing the ire of Tyco's board of directors. (Source: New York State Department of Correctional Services)