The Washington Post is calling for the criminal conviction of one of its own sources, saying Edward Snowden “broke the law” as well as “oaths and contractual obligations.”

“Mr. Snowden’s defenders don’t deny that he broke the law, not to mention oaths and contractual obligations, when he copied and kept 1.5 million classified documents,” the paper argued in an unsigned editorial Saturday evening. “They argue, rather, that Mr. Snowden’s noble purposes, and the policy changes his ‘whistle-blowing’ prompted, justified his actions.