Leads fizzling in Tylenol case

Once-promising leads on the Tylenol case are drying up fast. Police concede they may never know who returned the last bottle found tainted.

FBI fingerprint experts struck out during the weekend in efforts to lift prints from the red and white capsules - ending hopes they could provide direct evidence pointing to the person responsible for seven deaths.

McNeil Consumer Products Company, the maker of Tylenol, began airing commercials announcing the drug's return to the market - in tamperproof containers - and offering to swap consumers' remaining capsules for tablets. Sale of the product remains banned in Chicago.