With gang violence sweeping through the former middle class communities of Silver Spring and Wheaton, Md., come stabbings, shootings and murders often associated with drug dealing and Mexican gangs. The latest such murder to take place in Wheaton, came the day before Montgomery County prosecutors and police held a press conference on Reedie Drive to discuss the indictment of the accused killer of the Lyons sisters who vanished on March 25, 1975.