The Mexican Navy says tests confirm that a man killed in a shootout with marines was Heriberto Lazcano, the head of Los Zetas drug cartel. Officials said comparisons with fingerprints held on their database showed it was the drug boss, In a reference to reports that the body was missing, they said the body had been given to local authorities. Lazcano is a founder of Los Zetas which has been implicated in a string of mass killings and kidnappings. and his death would be a victory in the fight against cartels, analysts say. Lazcano was killed on Sunday in the northern state of Coahuila but his identity had not been confirmed until now. But the Mexican Navy says that fingerprints taken from the body were compared with those on their database, confirming that it was Lazcano. Also photos of the corpse's face were compared with previous photographs of Lazcano. However, the Mexican media are reporting that Lazcano's body is now missing.