FBI agent Karen Ann Marinos said the suspect "planned to use a confidential operator's manual to reprogram a specific brand of ATM so that the machine would issue $20 for every $1 requested."
In an attempt to remain anonymous, Morris purchased a $400 "Walmart Green Dot PrePaid card," which would then be used to withdraw the money from each of the hacked machines. Morris used the alias "Barack Obama" and wore a "Rick James Wig," using an unsecured wireless hotspot to activate the card.
The card was activated as Barack Obama, with a Washington, D.C. address of "1600 Pennsylvania Avenue" to boot.
When Morris tried to re-program one of the machines in Houston, the FBI swooped in on him.
Read the full affidavit here: http://www.thesmokinggun.com/archive/years/2010/0504101atm1.html