A somewhat odd, UK-centric BBC commentary by a RUSI expert:
Over the past 18 months, hundred of people have travelled from the UK to fight in Syria. Most have joined the self-styled Islamic State. Could banks assist the security authorities identify some of these so-called foreign fighters by uncovering "telltale" financial footprints?

(Near the end) ... engagement between the authorities and banks in exploiting this capability for security purposes remains limited despite the obvious benefits it can bring.
Link:http://www.bbc.co.uk/news/business-32722318

'Suspicious Activity Reports', known as SAR, are the common referral mechanism from the banks and other insitutions to the police. In both the UK & USA there are plenty of them, with only very few being productive. Above all "cash is king" and so the value of such cooperation is very moot.