Taiwan's Criminal Investigation Bureau has dismantled an underground money-laundering operation tied to gambling sites and scam rings — bad news for the fraud networks that relied on it, good news for victims and investigators.

• A fraud victim's report about money sent to an online casino platform led police to accounts with the hallmarks of an underground laundering house.
• The ring, led by a 29-year-old surnamed Wu, allegedly moved dirty cash for popular gambling sites and scam groups through shell companies and layered transfers.
• Rather than just recruiting stray account holders, the group ran the operation like a business, keeping bank books and company seals centrally locked up so funds could be shifted fast if police closed in.
• Officers seized phones, company seals, bank books and cash cards in two rounds of arrests; the laundered total is estimated at NT$3.6 billion.

Outlook: Wu and 12 others have been handed to Taipei prosecutors on fraud charges, and investigators are still working up the chain to the scam groups that used the service.