Center for Public Integrity

Bill Buzenberg will step down as executive director of the Center for Public Integrity, the organization announced Friday. Buzenberg was named to the post in 2007 after a long tenure at NPR. He's helped raise more than $50 million for CPI, the organization says, and he'll stay on until a replacement is named.

CPI just won its first Pulitzer Prize, for a series about black lung. ABC News contested the Pulitzer, saying its partnership with CPI on the story entitled it to part of the award.

Buzenberg replied to ABC News with a letter that said CPI reporter Chris Hamby "lived and breathed this investigation almost exclusively for a year." (Hamby recently left CPI for BuzzFeed.) ABC News "has a very very inflated idea of their role in this investigation," Buzenberg told Poynter at the time. Pulitzer Administrator Sig Gissler agreed, saying "the prize to the Hamby alone is warranted."