Fox News reporter Jana Winter is facing jail for refusing to reveal her source in an exclusive story on a notebook allegedly kept by James Holmes, the accused shooter in the July 2012 movie theater massacre in Aurora, Colo.
Winter has maintained that she will not reveal her source, a stance that saw former New York Times reporter Judith Miller sentenced to jail in 2005.
Miller spent 85 days in jail for protecting the identity of her Bush administration source who was involved in the controversial disclosure of a CIA employee's identity.
"We cannot do our jobs without confidential sources or we will be repeating just what the government tells us," Miller said on Fox News Watch Saturday.
"That is not the role of a free press," she added.
A Colorado judge is expected to decide Wednesday whether Winter will be called to testify.