A German company inadvertently embroiled in the Louvre Museum heist after one of its lifts was used in the theft is making the most of its free publicity - by launching a new advertising campaign.

Two traces of DNA were found in one of the helmets and one of the gloves suspects left behind after a jewelry heist at the Louvre on Sunday, French police told ABC News.

The Louvre in Paris is open again, days after the spectacular robbery at the world-renowned museum, the latest in a series of robberies that has left visitors puzzling over empty cabinets and police in search of clues.

The French crown jewels robbed from the Louvre museum in Paris are likely lost forever, an art crime expert tells CBS News, even if the thieves are caught.

Veteran detectives who have worked on similar cases said French investigators have a lot of evidence to work with in the Louvre jewel heist.

A specialized police unit is investigating a brazen daytime heist of eight pieces of jewelry worth about $102 million from Paris' Louvre Museum.

The precious artifacts snatched from Paris’s Louvre Museum on Sunday include an emerald necklace gifted by Napoleon to his second wife and other priceless crown jewels.