The idea had been simple. Import kangaroos from Australia, train them to become pickpockets, then let them loose in major cities all over Europe. Tourists would be relieved of their wallets and handbags, which the kangaroos would slip into their pouches. These would be emptied daily by Gang members; and any apprehended kangaroo could hardly be charged.
The plan went wrong immediately in Rome. Incensed that a rival mob was competing in the city, the local Mafia machine-gunned all the kangaroos, forever known afterwards as the Waltzing Matilda Massacre.