Three people charged with impeding the investigation of the 1975 slayings of two Maryland sisters have obtained legal representation in Virginia.

Leslie Engleking is charged with perjury. Gladys Stangee and Amy Johnson are charged with obstruction of justice. Stangee was arraigned Thursday in Bedford General District Court. A public defender was appointed to represent her. Engleking and Johnson have hired attorneys.

All three are relatives of Richard Welch, who has been named as a person of interest in the deaths of 12-year-old Sheila Lyon and 10-year-old Catherine Lyon of Wheaton, Maryland. Welch hasn't been charged and has said he's innocent. His nephew, Lloyd Lee Michael Welch Jr., has been charged with two counts of murder.

Authorities say the sisters were kidnapped and taken to Bedford County, where they were killed.