New guidlines for taser use on suspects

(CNN) - Popular stun-gun maker Taser International is asking police to think before they tase someone in the chest. The manufacturer is now saying the device presents a risk of causing cardiac arrest.

Local law enforcement says the taser, for the most part, has been a successful non-lethal tool.

New guidelines are coming though from Taser International, the Scottsdale based company that builds and tests these guns.

The company's web site even has a diagram showing the preferred target areas for police to target.

"You have an officer engaged in a stressful situation as it is, employing a non-lethal weapon and now, you're even minimizing a difficult target even more." Mark Spencer said.

Taser international researchers have concluded that if police tase a person near the heart, who happens to be on drugs, it can seriously injure them.

Ryan O'donnell has the latest on this tool that is supposed to eliminate the use of deadly force, but may be failing, in this internet health video report.