Mr Keen, Tracer of Lost Persons starring Phillip Clarke, originally broadcast April 10, 1952, 69 years ago, The Mother’s Plea Murder Case. Shirley Spears has been murdered...by the wife of the wealthy man she's trying to victimize. Agnes Gray seems to be the killer, but she swears that she's innocent. Agnes' son Jack confesses to the crime! Despite two other confessions, Mr. Keen names the killer in a surprise ending!