From the Lawrence Daily Journal-World for Jan. 4, 1973:

Three persons were expected to surrender to the U.S. Attorney in Topeka in connection with the previous day’s discovery of plastic explosives in Learned Hall, home of the Kansas University School of Engineering. Former KU students Ronald K. Johnson and David Bruce Akin and current engineering student Jack Louis Butler were expected to be charged with “illegal storage of explosive material, stealing or receiving government property valued in excess of $100 and of receiving or concealing stolen explosives,” according to Robert Miller, U.S. Magistrate in Kansas City, who had announced the names. The materials found included 23 pounds of plastic explosives, 49 ignition primers and some cord, all stored in a foot locker. The explosives were of the type known as C-4, which was slightly more powerful than dynamite, according to agents from the Alcohol, Tobacco and Firearms Division of the U.S. Treasury Department.