Study Questions Stun Gun Safety CBS 02/09/05
Taser Shares Slump on New Safety Concern Forbes 02/11/05
Stun Gun Death Jolts Chicago Cops CBS 02/11/05
The study, done by the Air Force and obtained by CBS News, found that repeated shocks from a Taser stun gun led to heart damage in pigs.
Specifically, the study examined the pigs' blood and found a jump in the enzyme Troponin T, the body's clearest sign of heart injury. It also found the pigs suffering high levels of blood acid, a potentially life threatening condition called acidosis.
This is the same study The Defense Department and Taser International Inc. cited as proof that stun-guns are "generally safe" and "without a significant risk of unintended severe effects".