A D.C. Superior Court grand jury indicted a D.C. Jail supervisor Wednesday for assaulting a Bolivian man who was being held for mental observation in the infirmary section of the jail.

Lt. Virgin W. Williams Jr., 53, of the 1000 block of Third Street SW, was accused of assaulting Carlos Salinas with Mace and "trained fists," according to the indictment. A D.C. Corrections Department official said Williams had some training as a boxer.

The indictment accuses Williams of trying to "maliciously disfigure" Salinas on Oct. 27, two days after Salinas was arrested for unlawful entry at the Washington Monument.

Salinas allegedly had gone to the White House and asked to see Nancy Reagan. He then went to the monument where he allegedly disrobed and refused to leave, according to one law enforcement official. Salinas has since been released on bond pending trial on the entry charge. Salinas required medical treatment after he was "severely beaten" at the jail, the official said.

Williams, a 12-year veteran, is charged formally with two counts of assault with a dangerous weapon, one weapon being the chemical Mace and the other being his "trained fists."

Williams, who is also charged with threatening Salinas "in a menacing manner," according to the indictment, will be arraigned within the next two weeks on the charges. An official said he would not be automatically suspended from his job, but could face disciplinary action after an internal investigation.