A Walk to the Mall
On March 25, 1975, sisters Katherine and Sheila Lyon left their family home in Montgomery County, Maryland, for what should have been an ordinary afternoon.
Katherine was 10 years old. Sheila was 12.
It was the second day of their school’s spring vacation, and the sisters had plans to walk to the Wheaton Plaza shopping center, where they intended to meet friends and have some pizza before heading home.
Their mother expected them back later that afternoon.
Instead, the two girls disappeared.
Neither Katherine nor Sheila would ever return home.
The Last Time Anyone Saw Them
Around 1 or 2 p.m., the sisters’ brother reportedly saw them eating pizza at the shopping center. Later, witnesses placed the girls leaving Wheaton Plaza sometime around 2 or 3 p.m.
They were walking west in the direction of their home.
That was the last confirmed sighting of Katherine and Sheila.
Their mother had told them to be home by approximately 3 or 4 o’clock. When they still hadn’t returned as she began preparing dinner, concern quickly replaced irritation.
Then came fear.
The family contacted police, and the search began almost immediately.
Relatives kept someone beside the telephone around the clock in case the girls called. Missing-person posters went up throughout the area, neighbors searched nearby streets and wooded areas, and their father, John Lyon, used his position at radio station WMAL to help spread the word.
Authorities organized house-to-house searches, used search dogs and a Maryland State Police helicopter, interviewed witnesses, and pursued hundreds of tips.
A reward was established for information leading to the girls’ safe return.
But Katherine and Sheila were nowhere to be found.
Four Decades of Questions
As the weeks turned into months, the family’s hope became increasingly difficult to maintain.
By the summer of 1975, investigators feared the sisters were probably dead. Yet without their bodies, there was no definitive explanation of what had happened after they walked away from the shopping center.
The investigation eventually became a cold case.
But it never truly disappeared.
Montgomery County detectives continued receiving leads over the years, and decades later, a new investigation would bring authorities back to one of the people who had been connected to the case from its earliest days.
His name was Lloyd Welch.
The Man Who Came Back Into the Case
In 1975, Welch was only 18 years old when he approached a security guard at the shopping center and claimed he had seen someone who matched the description of a possible suspect.
Investigators eventually determined that Welch had provided false information. He had reportedly failed a polygraph examination and acknowledged that he had lied, leading authorities to believe he may have been seeking the reward.
For decades, his name remained part of the complicated history of the investigation.
Then, in 2013, detectives approached Welch again.
By that time, he was incarcerated in Delaware on an unrelated conviction. During interviews with investigators, Welch gave changing accounts of what he knew about Katherine and Sheila.
But investigators eventually concluded that he had played a role in the girls’ disappearance.
The investigation that followed was extensive. Authorities spent thousands of hours rebuilding the case and examining Welch’s statements, including information concerning his family and property in Virginia.
Investigators came to believe that members of Welch’s family may have been involved in the girls’ abduction and subsequent deaths. However, those suspected roles were never established against every individual involved, and no other members of his family were charged.
A Guilty Plea, But No Bodies
In July 2015, Welch was charged with two counts of first-degree murder.
He later entered a guilty plea as part of a negotiated agreement. Welch admitted that he abducted Katherine and Sheila, but he did not admit to raping or killing them.
Investigators believed the sisters had been taken to Virginia and that their bodies may have been destroyed or burned on property associated with Welch’s family.
Searches were conducted there more than once.
Nothing was found.
The absence of the girls’ remains meant that one of the most important questions in the case remained unanswered: exactly what happened to Katherine and Sheila after they were abducted?
Welch was ultimately sentenced to two consecutive 48-year terms.
For the Lyon family, the legal conclusion brought a measure of finality after decades of waiting, but it could never give them what they wanted most.
Their daughters were still missing.
The Sisters Who Were Never Forgotten
More than 40 years had passed by the time the case reached the courtroom.
The girls who had simply gone to the mall for pizza had become the center of one of Maryland’s longest-running missing-person investigations.
Katherine and Sheila’s bodies have never been recovered.
Their final resting place remains unknown.
And although Lloyd Welch was convicted after admitting to abducting the sisters, important details surrounding their final moments remain unresolved.
Their family has carried those unanswered questions for more than half a century.
Katherine was 10.
Sheila was 12.
They left home together on a spring afternoon in 1975, expecting to return later that day.
They never did.
May Katherine and Sheila Lyon always be remembered.
This story is based on publicly available information and reported facts. It has been independently written and presented for informational purposes. Images, if any, belong to their respective owners.