Denver attorney Colin Barnacle, a fervent Denver Broncos fan and season ticket holder, isn?t one to challenge Mike Shanahan. But when the coach of the beloved Broncos subjected one of his players to a lie-detector test, Barnacle threw the flag. If clients call seeking advice on whether that?s a legal move, Barnacle?s reply is usually no. A federal law bars employers from using the exam in most cases. The Bronco on the hot seat is David Kircus. The receiver said he acted in self-defense in an incident that led to second-degree assault charges against him. Shanahan, instead of simply standing on the sidelines, came up with the idea to grill Kircus with a lie-detector to determine whether he was being honest. The 27-year-old athlete, reportedly eager to sit down and face the interrogation, passed. "If he flunked the test, he would not be with us," Shanahan was quoted as saying.