Afaik most people whose packages were intercepted did use BTC though, so the leak is not WU but the shipping company which was the same for all.
Yeah LE contacted the shipper to trace packages. The shipper knows all information.
i don't mean that now BTC is safer cause LE and the shipper now know the city it is being sent from. imo every package now sent from that city will be inspected by the shipper and customs.
But i'm talking about the original thing that broke the case open. i just remember no one using Western Union in 2019 , 2020 , only recently did i hear of people using that .imo Bitcoin much harder to trace especially if you tumble the bitcoins or use Monero
Western Union has every sender's name and address and city someone picked up the money sent. So then LE contacted shipper and said to examine every package from that city