Update: Montgomery County Assistant Police Chief, Russ Hamill, describes how detectives linked Lloyd Welch to the murders of Sheila and Katherine Lyon, two sisters who were abducted from Wheaton Plaza in 1975. Update: Welch was sentenced to 48 years, according to news reports. Original post: Lloyd Welch pleaded guilty Tuesday to the murders of Sheila and Katherine … Continue reading Police Official: Lyon Sisters Murder One of the Oldest Cold Cases in the U.S. (VIDEO)