Open a bank account with stolen dox and fraudulent ID, make the checks out to the name on the account, deposit them, withdraw cash when it becomes available. It takes quite a while for the whole clearing process from checks drawn on different banks to go through. Banks have to make the first $100 of the funds available the day after deposit, the rest the day after if the check is local and the account's older than 30 days. The victim has probably reported the checks stolen by now, though. This is why a friend of mine always has a couple of accounts open somewhere, so that he can take advantage of these things.
Comments
http://www.federalreserve.gov/pubs/regcc/examples.htm
http://www.federalreserve.gov/pubs/regcc/regcc.htm#delay
But, some banks can hold the deposit for a couple days. It varies.