Former Vice President Dick Cheney Discusses the Possibility of Terrorists Controlling His Implanted Defibrillator on '60 Minutes' Oct 20, 2013

Former Vice President Dick Cheney speaks to Dr. Sanjay Gupta, discussing for the first time the revelation that the defibrillator implanted in his chest could be used by terrorists to kill him ... Had manufacturer disable wireless function [...]

Hacking medical devices a review - biomed 2013 [...]
Biomed Sci Instrum. 2013;49:40-7.

Homicide by Insulin Pump has already happened -- homicide investigators could encounter homicide by lethal doses from insulin pump [...]
Am J Forensic Med Pathol. 2004 Jun;25(2):159-60.

FLASHBACK to 2008 ...
Hacking implanted defibrillators shockingly easy ... researchers have found that it's incredibly easy to reverse-engineer the communication protocol these radio transmissions and use that information to hack the implant. Also included besides  implantable cardioverter defibrillators (ICDs), are reprogrammable medical devices including pacemakers, neurostimulators, and implantable drug pumps [...]