Edit 2: I'm off guys, got to give the missus some attention. Thanks for all the questions and answers, stay safe and cool guys. If anyone has anything else later just drop me a pm.
Edit 1: Just a thanks to everyone that's contributed or asked a question so far, it's been cool doing this. I'll be around for a few more hours and then I have to dash but always feel free to pm me.
I work for a large legal firm that offers a substantial fraud detection service. I'm the lead developer on the project (so I can answer IT stuff too) but I also go out to see clients to push the service, and prototype new ways to catch you naughty people.
Without going into too much detail about the service, it's similar to what Snowden said about there being a search engine for people. With our service you can search a person/place/time/car/house/phone number/facebook/twitter profile etc and it will show you how that entity relates to other entities, and gives you a score of how likely that thing is involved with, or is in itself fraudulent.
Common rules apply, hopefully I can provide some insight.
Oh, and for the record, don't try and scam CC's or anything that makes the bank directly lose money, it is just not even remotely worth it.
First question is why are you doing an AMA with the very people you are trying to catch?