(photo courtesy of LanceArmstrong.com)

To avoid further controversy, Lance Armstrong has resigned as chairman of the Livestrong cancer charity which he founded.

The U.S. Anti-Doping Agency recently announced it has overwhelming evidence that the seven-time Tour de France winner took part in a sophisticated doping program during his cycling career.  A professor of philanthropic studies at IU-Bloomington says he is sorry but not surprised.

Listen:  Dr. Les Lenkowsky with 93 WIBC's Ed Wenck:

"I expected that his value to Livestrong was..much diminished as a result of the scandals," says Dr. Les Lenkowsky.  "So I am not surprised that both he and the organization felt that the time had come for a parting of the ways."

Dr. Lenkowksy says the charity has been preparing for something like this.  

"For the last ten years, it's actually been rebranding itself as a very distinct organization from Lance Armstrong," he said.  "It's developed an independent and nationally prominent board of trustees."