Juror recognizes undercover cop on witness stand - and threatens him

Friday, January 21st 2011, 4:00 AM

A Brooklyn juror was tossed in jail for threatening to kill a cop - after he recognized the undercover detective on the witness stand, the Daily News has learned.

Sean Adams, 43, sitting on a grand jury for a narcotics case Wednesday, was right next to the witness stand when the cop took the chair to testify, sources said.

In a bizarre coincidence, the detective was one of several undercover cops who has been investigating Adams in a separate narcotics case.

Adams recognized him and realized the guy he'd been dealing with on the street was really a cop, the sources said.

"Ahh, f--- this guy. I'm going to kill him," Adams said, according to court documents.

The officer, realizing his cover was blown, motioned to the prosecutor to speak outside the courtroom.

After they chatted about the threat, other members of the NYPD's narcotics unit arrested Adams, sources said.

He was arraigned Thursday on charges of tampering with a witness and intimidation of a witness, both felonies. He was held in lieu of $7,500 bail.

The details of the grand jury case were not disclosed. Adams later denied making the threat.

It was not immediately clear if the narcotics case against Adams was compromised because he blew the detective's cover.