with the girls' murders there; he pleaded guilty to murder two years later. His uncle is a person of interest as well. Background to the sisters' disappearance The two sisters were born to John and Mary Lyon in Kensington, Maryland. They had an older brother, Jay, who later became a policeman. Their father, John Lyon, was a well-known radio personality at WMAL, a local radio station then held by the owner of the ABC Television affiliate in Washington and the now-defunct Washington Star; he later worked as a victims' counselor. The sisters' disappearance continued to be featured in high-profile stories in the national media for months. Located a half-mile away from their home was Wheaton Plaza shopping mall (now Westfield Wheaton). On March 25, 1975, Katherine and Sheila Lyon walked to the mall to see the Easter exhibits. It was their spring vacation and they planned to have lunch at the Orange Bowl, a pizza restaurant which was part of the mall. They left home between 11:00 AM and noon. Their mother had instructed them to return home by 4:00 PM; when they had not arrived by 7:00 PM, the police were called and an extensive search was conducted. Police felt comfortable enough with the accuracy of this timeline to release it to the public: 11:00 AM to Noon: The girls leave home. 1:00 PM: A neighborhood child sees both of the girls together outside the Orange Bowl speaking to an unidentified man, according to what he later tells investigators. 2:00 PM: The girls' older brother sees them at the Orange Bowl eating pizza together. 2:30 to 3:00 PM: A friend sees the girls walking westward down a street near the mall which would have been one of the most direct routes from the mall to their home. This is the final sighting of the sisters that is absolutely confirmed by the police. 4:00 PM: This curfew set by their mother passes. The girls are expected home and do not arrive. 7:00 PM: Police are called. The investigation and an active search by professionals begins. Police investigation Police were told by witnesses that the sisters were in the Wheaton Plaza mall at approximately 1 PM. A neighborhood boy, who knew the sisters, reported that he saw them together outside the Orange Bowl speaking with an unidentified man, about 6 feet tall, 50 to 60 years old, and wearing a brown