An arrest would cap a revived investigation into the 2001 killing that had gone cold for years after destroying the career of former U.S. Rep. Gary Condit of California.

Investigators in 2002 questioned Ingmar Guandique, now 27, in the slaying after he was convicted of attacking two women joggers in Washington's Rock Creek Park. They didn't charge him, but statements he made to people while in prison helped lead investigators back to him, said the person, who was not authorized to discuss the case publicly and spoke on condition of anonymity Saturday.

A law enforcement official who has spoken to investigators said the break came in part from DNA evidence that was either retested or collected, and it was connected to Guandique. The official spoke on the condition of anonymity because the Levy investigation is ongoing.

Local prosecutors have convened a grand jury in the District of Columbia, and an arrest warrant is expected within the next few days, the officials said. Levy's father, Robert Levy, said Washington, D.C., Police Chief Cathy Lanier called his home late Friday and said the same thing.