 After <unk> across the desert and nearly dying of <unk> , Tintin and Haddock are rescued and taken to a French outpost , where they hear on the radio the storm sunk the Karaboudjan . They travel to a Moroccan port , and along the way are attacked by <unk> tribesmen , defending themselves with French <unk> @-@ 36 rifles . At the port , members of his old crew kidnap the Captain after he recognises their disguised Karaboudjan . Tintin meets Thomson and Thompson who got his message , and they learn that the wealthy merchant Omar ben Salaad sold the crab tins ; Tintin tells Thomson and Thompson to discreetly investigate . Tintin tracks down the gang and saves the Captain , but they both become intoxicated by the fumes from wine barrels breached in a shootout with the villains . Haddock chases a gang @-@ member from the cellar to an entrance behind a bookcase in Salaad 's house . Upon sobering up , Tintin discovers a necklace of a crab with golden claws on the now @-@ subdued owner of the wine cellar , Omar ben Salaad , and realizes that he is the leader of the drug <unk> . Allan steals a boat and tries escaping , but Tintin captures him . The police arrest the gang and free the Japanese man , who introduces himself as <unk> Kuraki , a police detective who was trying to warn Tintin of the group he was up against . He had been investigating the sailor on Haddock 's crew who drowned ; the sailor was on the verge of bringing him opium before he was eliminated . Turning on the radio , Tintin learns that , thanks to him , the entire organisation of the Crab with the Golden Claws is behind bars . 
