"I will be unable to function effectively in my profession and my career will be over," Winter wrote. "This is not an exaggeration - it is a provable certainty."
She also said she has been subjected to threats on the Internet by supporters of Holmes.
Derigan Silver, who teaches media law at the University of Denver, expressed concern that Winter's case could have a chilling effect on investigative journalism and that journalists may be reluctant to pursue challenging stories that rely on confidential sources.
"As a journalist, you ask yourself, 'Do I sit in front of Britney Spears' house and snap some pics or do I cover this really important story and maybe go to jail,'" he said.
Silver argued that investigative journalism is in the public interest and Winter's case should be a rallying point for everyone interested in a free press.
"If people want good important stories, we have to stand up for the reporters doing those stories," he said.