Bloomberg: New York Times reporter James Risen prevailed over the U.S. government in its three-year effort to force him to testify at trial about a confidential source as part of a CIA leak prosecution.

The request by prosecutors that Risen be dropped as a witness capped a longer battle to avoid revealing his sources. The fight reached the U.S. Supreme Court, focusing attention on the Obama administration’s aggressive pursuit of leaks. U.S. Attorney General Eric Holder reacted to the controversy by issuing guidelines last year restricting the use of subpoenas and search warrants for journalists.

Risen told a judge Jan. 5 he wouldn’t answer questions that could help identify the sources for his report on a bungled Central Intelligence Agency program to give Iran false nuclear weapon development data.