The man accused of killing federal intern Chandra Levy in Washington in 2001 has pleaded not guilty to additional charges.
Ingmar Guandique was recently indicted on additional charges including obstructing justice. Authorities said that while in jail he conveyed threats to a witness in the case.
On Tuesday, Guandique's lawyer entered a not-guilty plea for him to all the charges during an arraignment in D.C. Superior Court.
Guandique was charged in April with first-degree murder and other counts in connection with Levy's death. He has pleaded not guilty to those charges.
Guandique has been serving a 10-year sentence for separate assaults in Rock Creek Park.
KCRA.com contributed to this report.