Washington police have begun a search of a US Congressman's apartment for clues in the disappearance of missing intern Chandra Levy.
Gary Condit has also been asked to take a lie detector test and submit a DNA sample.
Police have reiterated that the 53-year-old is not a suspect in Levy's disappearance. They are acting in response to an invitation by Abbe Lowell, the congressman's lawyer, to allow a search and submit to a DNA test.
"It's not saying he's a suspect or that we expect to find anything," Chief Charles Ramsey said. "We are doing the responsible thing and following up on (Mr Lowell's) offer."
Executive Assistant Police Chief Terrance Gainer said authorities would conduct an "open-ended search," and probably would employ a chemical, Luminol. This, with the help of an ultraviolet light, allows blood to be seen even on surfaces that have been cleaned or painted.
Police, however, say they have no evidence of foul play and still classify the investigation as a missing persons case.
Mr Ramsey says police have contacted Mr Lowell to see if Mr Condit will submit to the polygraph test and give the DNA sample. The police chief says he hopes the test can be done in the next day or two.
Levy, 24, of Modesto, California, was last seen on April 30. Her internship with the federal Bureau of Prisons had just ended, and she was planning to return home to participate in graduation ceremonies at the University of Southern California.
Police searched her apartment and found nothing missing but her keys. Her bags were packed.