The Beltway Snipers (S01E08)

For three weeks in October 2002, an unidentified sniper instills fear in the people of Washington, D.C. As the body count rises, FBI agents are desperately on the trail of the elusive killer. Despite their efforts, the investigation falters due to sparse evidence and numerous dead ends. However, will the enigmatic hints left behind by the shooter provide the breakthrough needed to stop the rampage?