Nick Carter Master Detective Drug Ring Murder Ep 31 1940s Mystery Old Time Radio Show

In pursuit of a dope ring, and killers Nick is strangled, tied, weighted, and dropped into the ocean.
About:
Nick Carter, Master Detective was a Mutual radio crime drama based on tales of the fictional private detective Nick Carter from Street & Smith's dime novels and pulp magazines. Nick Carter first came to radio as The Return of Nick Carter, a reference to the character's pulp origins, but the title was soon changed to Nick Carter, Master Detective. A veteran radio dramatist, Ferrin Fraser, wrote many of the scripts.
(Wikipedia)