http://washington.cbslocal.com/2014...son-of-interest-in-missing-lyon-sisters-case/
"LANHAM, Md. (CBSDC) Nearly 40 years after two girls disappeared walking home in Montgomery County, police say they have a potential break in the case.
Montgomery County Police say they have a significant development in the disappearance case of the Lyon sisters Sheila, 12, and Katherine, 10 who vanished in 1975 while walking home in Kensington.
Montgomery County Police Chief J. Thomas Manger and Special Agent in Charge of the FBI in Maryland Steve Vogt will make the announcement at a news conference Tuesday.
According to police, detectives have identified a person of interest who was at Wheaton Plaza on the day the girls disappeared. Police say the person of interest is a convicted child sex offender who is currently in prison.
They plan to release photos of the person of interest on Tuesday in hopes of gathering more information about him, his associates, and his activities, according to a press release.
Sheila and Katherine Lyon left their Kensington home on March 25, 1975 and walked to nearby Wheaton Plaza. The girls never returned home.
Several witnesses, including the girls older brother, saw the two girls inside the shopping mall before their disappearance. An extensive search and investigation process resulted, but no one has been charged in the case."