''It is a new source of evidence,'' he added. ''It has promise.'' The only prints on the capsule, if there are any at all, should be those of the person responsible for the killings. Additionally, the new bottle's batch number - MC 2880, the same batch that killed four other victims - could help detectives track down where the contamination occurred or at what common point, such as a warehouse, the poisoner had access to that batch.
And because the new bottle of poisoned capsules was in an advanced state of deterioration from the corrosive poison, it should help the authorities work back in time to determine when the contamination occurred and where the batch's bottles were that day.
A technician found the contaminated bottle at a lab in suburban Lemont while using litmus paper in a random checking procedure.
CHICAGO (UPI) — The task force hunting the Tylenol killer searched mounds of refund slips hoping to find the shopper who unknowingly gave a valuable clue — an unopened bottle containing poisoned capsules.
FBI experts in Washington used a laser beam Friday looking for fingerprints of the person who filled capsules of Extra-Strength Tylenol with lethal doses of cyanide. Seven people died from the poison three weeks ago.
Larry Nauman, Dominick's vice president, said it may not be easy to find the shopper who returned the bottle Oct. 2 during a massive recall. Refunds were given to "anyone and everyone," he said, and not all customers put their names and addresses on the bottles.
The bottle was one of thousands turned in by customers or swept from store shelves after the seven deaths. Investigators say they hope the buyer will remember when and where the bottle was purchased.
Police Superintendent Richard Brzeczek said there is a "faint possibility" fingerprints would be found on the bottle, which contained up to 13 spiked capsules. Attorney General Tyrone Fahner, head of the Tylenol task force, was more optimistic.
"It gives us the opportunity to have a clean bottle for the first time to check for fingerprints," Fahner said, calling the discovery "very significant."
Fahner' said the contents already were decomposing because the cyanide was destroying the gelatin shells. The laboratory that found the tainted pills has examined more than 150,000 samples of Tylenol Extra-Strength capsules under a private contract from McNeil Consumer Products Co.
The FBI crime lab in Washington employed laser technology in trying to lift usable fingerprints from the latest contaminated capsules, described by officials as deteriorated after apparently sitting in the bottle for several weeks.