Washington, D.C. ? In the nearly eight years since intern Chandra Levy was attacked and killed in a Washington park, witnesses said a Salvadoran immigrant boasted in letters and jailhouse conversations that he picked out women randomly and stalked them. One witness said the man even bragged of maiming and killing people.

While behind bars for two other attacks in the same park where Levy was killed, police say, Ingmar Guandique revealed that one of those women was Levy, explaining over time how with the help of two teenagers, he grabbed her by the neck and choked her so other joggers wouldn’t hear her screams.

Authorities issued an arrest warrant Tuesday for Guandique, 27, and said he would be charged with first-degree murder in Levy’s death. He is expected to be brought back to Washington from the federal prison in Adelanto, Calif., where he is serving time for attacking the other two women, sometime in the next two months.