A Walter Reed pharmacist who was charged in the fatal shooting of her husband in March was indicted Thursday on a charge of first-degree murder while armed.

At a hearing Friday in D.C. Superior Court, Diana Lalchan, 28, pleaded not guilty in the March 28 slaying of her husband, Christopher Lalchan, 36, in their Southwest Washington apartment in the 1200 block of Fourth Street SW.

Lalchan was originally charged with second-degree murder in the case. At a hearing in April, Lalchan, through her attorney, said she shot her husband in self-defense. Judge Robert E. Morin reduced the charge to voluntary manslaughter and ordered her released from D.C. jail and to be placed on Global Positioning System monitoring. At the time, however, Morin said he had concerns that Christopher Lalchan was shot in the back of the head.

Prosecutors and detectives were able to persuade the grand jury to upgrade the charges to first-degree murder.

At the hearing, Assistant U.S. Attorney Cynthia Wright requested that Lalchan be remanded to D.C. jail as a result of the indictment. Judge Ronna L. Beck denied the request. Lalchan remains out of jail and on GPS monitoring. Her attorney said Lalchan was working but did not say whether she was still at Walter Reed.

A trial has been set for March 3.