US marshal trial goes to jury:

ABC TV Chicago reports:

A federal judge took the stand Thursday in the trial of Deputy US Marshal John Ambrose. The testimony of this surprise witness is the final twist in the case that went to the jury late Thursday afternoon.

Ambrose is accused of leaking information about a federal witness to members of the Chicago mob. Judge Charles Kocoras was called to testify about the character of the defendant, John Ambrose.

Ambrose said this is a case where the government has a gaping hole in its charges against him.

The deputy US marshal had his last shot at convincing the jury that while he "screwed up" -- to use his words -- he did nothing criminal. And, in an unusual move, the federal judge was called as a witness by Ambrose. Kocoras is a well known, longtime federal judge, indeed the chief judge from 2002-2006.

You'll want to watch this video.