Three men allegedly installed Credit Card Skimming keyloggers at into cash registers in a Nordstrom department store in Florida. Those Keyloggers were connected via a keyboard cord between the keyboard and the computer to intercept the information transmitted between the two devices. The gang used the connectors designed to resemble common PS2 cables. It is unknown if the men ever returned to the store in order to collect the keylogger from store. Nordstrom are unaware of any arrests being made. The devices can be easily obtained online for about $40 only.
Source: https://thehackernews.com/2013/10/hardware-keylogger-used-by-card.html