Thisseriesexploressomeofthemoststartlingcriminalcasesofthepasttwodecadeswheretechnologyhaschangedthecourseoftheinvestigations.Sometimesthetechnologyavailableatthetimeisunabletohelp,ineffectforensictoolsandtechniquesareconstantlybeingderivedtohelpcatchupanddecryptthemassofevidenceleftbehindatacrimescene.Thisshowchroniclescasesinwhichthishashappened.