Police in Washington, D.C., and Maryland have named a convicted sex offender as a person of interest in the nearly 40-year-old case of the Lyon sisters' disappearance.
Witnesses claim that Lloyd Lee Welch, a 57-year-old drifter, seemed to pay special attention to the Lyon sisters — Sheila, 12, and Katherine, 10 — when the girls spent an afternoon at the Wheaton Plaza shopping mall in March 1975. They never returned home and were never found.
"We need everyone who may know something to come forward,"
Steve Vogt, special agent in charge of the FBI in Maryland, told the Washington Post Tuesday. "It might be enough to put the pieces of this puzzle together."
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Welch was on the cops' radar back when the crime was initially committed, but he was 18 at the time and it would be years before he was convicted of sex crimes in other states, according to the Post.
He's currently incarcerated in Delaware where he is slated for a 2027 release.
Police are now attempting to track down any security guards who worked at the Wheaton Plaza in 1975 to see if they remember seeing Welch following the girls.
Meanwhile, the Lyon family has continued to ask for privacy.
"March 25th will mark 39 years since Kate and Sheila were taken from our family," the family said in a statement. "Throughout these years our hopes for a resolution of this mystery have been sustained by the support and efforts of countless members of law enforcement, the news media, and the community. The fact that so many people still care about this case means a great deal to us."
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