St. Louis County Prosecutor Robert McCulloch said the Twitter account of a woman claiming to have inside information from the grand jury in the Michael Brown case was indeed hacked.

On Thursday, McCulloch said investigators have not found out who wrote the message on social media. But, he said, the investigators determined that the account had been hacked and the woman who owned the account had no connection to anyone on the grand jury.

The grand jury is considering whether Officer Darren Wilson should be charged in the Aug. 9 shooting.

The message on Twitter had said: “I know someone sitting on the grand jury of this case There isn’t enough at this point to warrant an arrest.”

In a letter released to reporters on Thursday morning, McCulloch said there have been no grand jury leaks at all. McCulloch said reports by the Post-Dispatch and New York Times did not rely on information from the grand jury. The information came from other sources.