Golgo 13

Afterglow (1x17)

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On a routine assassination job in Hawaii, Golgo 13 spots an old FBI detective named Leon Goldman, who had tried to charge him with a previous assassination in San Francisco. At the scene of the current assassination, Goldman automatically knew that Golgo 13 was the sniper, but kept quiet because he did not wish to deal with such a trivial case any longer and tries to convince Golgo 13 to leave. At the end of episode Golgo 13 kills Leon himself.