Police are investigating a 17-year-old "person of interest" in the death of a teenage girl found last week in a northern Virginia park.

Sixteen-year-old Jholie Moussa of Alexandria had been missing since mid-January and was initially listed as a runaway. Her body was found Friday in a park.

At a press conference Tuesday, police said they learned later in their investigation that Jholie had been the victim of a previously unreported assault.

Police said a 17-year-old, whose name was not released, is now in custody and charged with assaulting Jholie. Police spokesman Richard Perez said the 17-year-old is also a person of interest in her death.

But he said police are still pursuing other leads as well.