The private lie-detector test administered to Rep. Gary Condit is a "joke and not worth anything," Washington, D.C., Asst. Police Chief Terry Gainer says.

Gainer told Fox News Wednesday night that the California Democrat was asked only three questions about the disappearance of Chandra Levy, the former federal Bureau of Prisons intern with whom Condit had an affair and who has not been seen since April 30:

• "Did the congressman have anything at all to do with the disappearance of Ms. Levy?"

• "Did he harm her or cause anyone else to harm her in any way?"

• "Does he know where she can be located?"

Condit's lawyer, Abbe Lowell, said last week that Condit had answered the three questions with flying colors. The congressman submitted to the private polygraph, without police investigators present, under pressure from Washington police and Levy's parents.

Washington police would like the congressman to take a lie-detector test administered by an FBI polygraph expert because they want to ask him more about his relationship with Levy and what he knows of her state of mind at the time she disappeared, Police Chief Charles Ramsey has said.

Condit, whose district includes Levy's hometown of Modesto, Calif., acknowledged to investigators that he was having an affair with the missing intern, a police source has said.

Gainer said two other people have been given lie detector tests, which served as a tool to eliminate those being tied to the missing intern case.

He said Levy's friend and co-worker at the Bureau of Prisons, Sven Jones, was asked to take the test. Jones accepted and then later refused, and so far has not received one, Gainer said.

Condit, 53 and married, is not a suspect in Levy's disappearance, police have said. He has kept a public silence, and only acknowledged the romantic relationship in his third interview with police on July 6, the source said.

Gainer expressed irritation at a CBS News report that the FBI has moved the probe to its "cold case" division because federal investigators believe too much emphasis has been placed on Condit.

He said the federal bureau has always been involved and has interviewed all the individuals outside of Washington, D.C., and assisted in some interviews within D.C.

D.C. police asked special agent Brad Garrett, the new lead FBI investigator, to join the investigation because Garrett specializes in creating psychological profiles, Gainer said. The FBI is in the midst of creating a profile of Levy and a "potential offender," he said.

Gainer said he has never heard that the FBI is unhappy with the way police have handled the case, adding that there is no real change in status. And he said it's the FBI that has focused on out-of-state leads and "the congressional connection."

Chief Ramsey also said officials at the FBI have said nothing to him about a status change. He said the media, not police, have put the focus on the congressman.

Police have four theories: Levy left of her own accord, committed suicide, has amnesia or is the victim of foul play.

Police say the suicide theory becomes more unlikely with each passing day because a body has not been found. Last week, police released computer-generated pictures of Levy showing how she might look if she changed her hairstyle.

Levy was last seen when she canceled her membership at a health club. She was making preparations to return home to attend her graduation ceremony at the University of Southern California.

Fox News' Rita Cosby and The Associated Press contributed to this report.