Jesse Matthew Jr. will be charged with first-degree murder in the death of Hannah Graham, a decision that will be announced at a press conference on Tuesday morning, according to sources cited by two local news networks, WTVR and WVIR. Graham, an 18-year-old University of Virginia student, went missing in September.

Matthew is currently charged with abduction with intent to defile, linked to the disappearance of Graham, a sophomore at UVA. Her body was found in October in a wooded area outside Albemarle, Virginia, and her death was ruled a homicide. Authorities have not released specifics about the evidence found or the cause of her death, The Washington Post reported. Surveillance footage from the night of her disappearance show Matthew and Graham together. Matthew, after being declared a person of interest in the case, had fled to Texas, where he was arrested last September.

Matthew has also been charged with attacking a Fairfax City woman in 2005, in an incident where he allegedly dragged a woman to a park and attacked her, with DNA evidence linking him to this case, CBS affiliate WTVR reported. The trial for that case is scheduled for March 9, but his lawyer has asked for a delay.

Matthew has also been forensically linked to the disappearance of Virginia Tech student Morgan Harrington, who went missing in 2009 after leaving a Metallica concert on the UVA campus, authorities said. Her body was discovered months later, on a farm near Charlottesville. No charges have yet been brought forward in the Harrington case.

Matthew is being held in a Fairfax County jail, NBC affiliate WVIR also reported. Tuesday's press conference will be hosted by the Albemarle County Police Department and the Albemarle County Commonwealth’s Attorney, WTVR reported.