Sheila Mary Lyon was 12 years old when she and her 10-year-old sister, Katherine Mary Lyon, left their Kensington, Maryland, home on March 25, 1975, during spring break and walked about a half-mile to Wheaton Plaza Shopping Center in Wheaton. Sheila was described as a White girl with blond hair and blue eyes, about 5 feet 2 inches tall and 100 pounds, and she wore farsighted gold wire-rimmed glasses.
The sisters planned a simple afternoon: looking at Easter displays, visiting with friends, and eating pizza at the Orange Bowl restaurant. Their older brother saw them eating there at about 2:00 p.m.; later, a friend reported seeing the girls walking west on Drumm Avenue near Devon Street, a direct route toward home, sometime between 2:30 and 3:30 p.m. That sighting became one of the last confirmed glimpses of Sheila and Katherine alive. Their mother expected them home by 4:00 p.m., and when they still had not returned by 7:00 p.m., authorities were called and a search began.
The disappearance shook Montgomery County and the broader Washington-area community because Sheila and Katherine had vanished from a familiar public place in the middle of an ordinary family day. The National Center for Missing & Exploited Children continues to list Sheila as missing since March 25, 1975, from Wheaton, Maryland, and notes that both sisters were last seen at Wheaton Plaza Shopping Center. NCMEC also records that Sheila was last seen wearing her farsighted gold wire-rimmed glasses, and that police later sought information about vehicles believed possibly connected to the disappearance, including a late-1960s or 1970s station wagon. In the early days and weeks, the Lyon family endured not only grief and fear, but also cruel extortion-style calls. One caller demanded that the girls’ father leave money in a courthouse restroom in Annapolis; money was left under police supervision, but it was never collected, and the caller never provided proof that Sheila or Katherine were alive.
For decades, the case remained unresolved despite searches, interviews, tips, and renewed public appeals. In 2014, the Montgomery County Police Department and the FBI named Lloyd Lee Welch, also known as Michael Welch, as a person of interest, and investigators focused on possible connections to Bedford County, Virginia, including Taylor’s Mountain. Montgomery County Police publicly stated that their cold-case detectives were working with the Bedford County Sheriff’s Office and Virginia State Police to look for evidence and information that could show a connection between Welch, members of his family, and the girls’ disappearance. The department also emphasized that the investigation had never truly been abandoned and that its goal was to bring the person or people responsible to justice.
The long investigation eventually led to a prosecution in Virginia. In 2015, Lloyd Lee Welch was indicted in connection with the sisters’ deaths, and in 2017 he pleaded guilty to the murders of Sheila and Katherine Lyon. Montgomery County Police announced the plea on September 12, 2017, with the police chief saying the community still grieved with the Lyon family and that generations of officers had never stopped caring about the case. Welch was sentenced in Bedford County, Virginia, to 48 years in prison for the first-degree felony murders of the Lyon sisters. Authorities have said the girls’ bodies have never been found, and prosecutors’ theory placed their remains in Bedford County, with allegations that at least one sister’s body was burned on property connected to Welch family members on Taylor’s Mountain.
Nearly half a century after Sheila and Katherine disappeared, the case stands as a devastating story of two children who left home for a short spring-break outing and never returned, a family that endured decades without the comfort of bringing them home, and investigators who continued to revisit old evidence until a suspect was held accountable in court. Sheila’s case began as a missing child investigation centered on Wheaton Plaza, eyewitness sightings, possible vehicles, and desperate searches; it became one of the region’s most haunting cold cases; and it ultimately resulted in Lloyd Lee Welch’s murder conviction, even though the sisters’ remains have still not been recovered. The overview of the case is that Sheila Lyon, age 12, and her sister Katherine vanished from Wheaton, Maryland, on March 25, 1975, after visiting Wheaton Plaza, and after more than 40 years of investigation, Lloyd Lee Welch pleaded guilty to their murders, bringing a measure of legal accountability but not the full answers or homecoming their family deserved.Last Seen: Mar 25, 1975
