Complying with a court order minutes before Monday’s 5 p.m. deadline, the Environmental Protection Agency yesterday released 2,100 emails received or sent by EPA Administrator Lisa Jackson on one of her non-public accounts. But which one? The name on the email account was redacted.

The information provided by the EPA under court order doesn’t satisfy the man who discovered that Jackson has been using the alias “Richard Windsor” on an email account from which she may have sent messages on the administration’s coal policy. Using the alias would shield those communications from Freedom of Information Act (FOIA) requests.

Chris Horner of the free-market Competitive Enterprise Institute says he discovered Jackson’s “false identity” while doing research for his book, “The Liberal War on Transparency.”

Late Monday, Horner called the EPA’s document release “deeply troubling.”

“[It] seems to have gravely compounded the unlawful activity we have exposed involving a false identity assumed for federal recordkeeping purposes,” he said.