保障证人安全：法律与社会的双重保护机制在线刻度尺

　　How long can a witness to another witness being gunned down survive in the Roaring 20s U.S. ? The trigger-men are prized customers of eyewitness no. 2, timid gunsmith Cyril T. Jones who withstands 3 bullets from his clients. Jonesy stalls while hospitalized, pretending he can't talk, whenever the law tries to interrogate him.