1929-1968 1962-1975 1975- 20thcentury abductions africanamericans assassinationking casestudies coldcases(criminalinvestigation) general history innercities investigation jews katherine kidnappings lloydlee lyon martinluther maryland missingpersons montgomerycounty murder politicsandgovernment racerelations raceriots sheila socialclasses socialconditions truecrime unitedstates welch