Louvre museum heist probe: What we know

Thieves in October broke into the French capital's world-famous Louvre museum in broad daylight, escaping in under eight minutes with jewellery worth $102 million. - DNA samples - During the escape, "you can sense a certain amount of stress -- no doubt because they are actually doing it -- which means they end up dropping the jewellery and also leaving behind DNA traces," Beccuau said.