Most civilians are sympathetic to officers, and most civilians think that officers should only be allowed to shoot under very specific circumstances. And in most jurisdictions, there are strict rules governing the use of deadly force. Since the taser is potentially deadly, its use should at minimum be governed by stringent regulation, similar to the deadly force rule.
Here are some Pennsylvania rules:
3.05 DEADLY FORCE
Members and enforcement officers shall use deadly force in the performance of official duties in accordance with this regulation, other Department regulations and existing statutes. Nothing contained in this regulation shall preclude the use of deadly force in self-defense, when warranted.
A. Arrest: Officers may use deadly force to effect the arrest or prevent the escape of a felon, when ALL of the following elements are present:
1. Knowledge a violent felony was committed.
2. Knowledge or reasonable belief that the suspect did, in fact, commit a violent felony.
3. Probable cause to believe the suspect poses a significant threat of death or serious bodily injury unless arrested without delay.
4. All other reasonable means of effecting the arrest or preventing the escape have been exhausted.
B. Protection: Officers may use deadly force to protect themselves or another from what they reasonably believe to be an imminent threat of death or serious bodily injury.
C. Firearms: Officers shall only discharge a weapon when the use of deadly force is justified. Officers shall not shoot to kill or shoot to wound, but shall shoot to stop the action by causing the instant incapacitation of the threat. For maximum stopping effectiveness and to minimize the danger to innocent bystanders, officers should:
1. Shoot at the center of available body mass presented by the threat.
2. Shoot at an alternative target, such as the head or pelvic area, when circumstances (i.e., body armor, drugs, adrenaline, etc.) render the center mass of torso target ineffective at immediately stopping the action.
D. Risk to Innocent Bystanders: Officers facing the decision to use deadly force must be cognizant of any innocent third parties that may be present in or near the line of fire. Officers are prohibited from discharging firearms when it appears reasonably likely an innocent person may be injured unless failure to use deadly force would likely result in the immediate death or serious bodily injury of the member, enforcement officer, or another person.
E. Other Offenses: Officers shall not utilize deadly force to effect the apprehension of persons who commit violations of the law amounting to summary or misdemeanor offenses, or who committed a felony, but do not present a threat of death or serious bodily injury.
http://www.pittsburghlive.com/x/tribune-review/news/s_112228.htmlHere are some Georgia rules:
3. Justification for the Use of Deadly Force
Use of deadly force by an officer during his/her performance of duty is restricted to the following:
"Sheriffs and peace officers who are appointed or employed in conformity with Chapter 8 of Title 35 may use deadly force to apprehend a suspected felon only when the officer reasonably believes that the suspect possesses a deadly weapon or any object, device, or instrument which, when used offensively against a person, is likely to or actually does result in serious bodily injury; when the officer reasonably believes that the suspect poses an immediate threat of physical violence to the officer or others; or when there is probable cause to believe that the suspect has committed a crime involving the infliction or threatened infliction of serious physical harm" OCGA 17-4-20.
The following examples are provided to show when an officer may use deadly force:
1. When the officer reasonably believes it necessary to defend his/her own life or the life of another, or to prevent grave bodily injury to him/her self or another and all available means of defense have failed or would be inadequate or dangerous under the circumstances;
2. When necessary to prevent the commission of forcible felonies;
NOTE: Deadly force shall not be used towards persons who have committed or are committing traffic violations, misdemeanors, non-forcible felonies, or forcible felonies not in progress.
3. To effect the arrest of a person at the scene of a crime who is attempting to escape, but only if there is a serious threat of immediate danger to the officer or third persons, such as the use of firearms or taking of hostages;
ATTENTION CEO: The U.S. Supreme Court's rule in Tennessee v. Garner permits police to shoot at fleeing felony suspects currently known to be unarmed if the suspects previously demonstrated their violence propensity by committing a crime of violence (e.g., armed robbery). Consequently, agencies should seek legal advice before finalizing a use of deadly force policy.
4. When necessary to destroy a fatally wounded or sick animal, but only after making every reasonable attempt to locate and receive permission from the animal's owner and only if an Animal Control officer is unable to respond in a reasonable amount of time.
NOTE: Special care should be taken to ensure that no person or property is injured or damaged when an officer fires his/her weapon.
5. When necessary to destroy an obviously mad or vicious animal that cannot otherwise be controlled. Again, Animal Control should be contacted first. Only when Animal Control officers are unable to respond in a reasonable amount of time should an officer destroy an obviously mad or vicious animal.
4. Shoot to Stop the Commission of a Forcible Felony
1. Before using a firearm, officers shall identify themselves and state their intent to shoot, when feasible;
2. Officers shall fire their weapon to stop an assailant from completing a potentially deadly act as described in section C above. Officers should shoot at the largest available mass provided by the assailant as a target area for the officer, to stop the threat and to minimize danger to innocent bystanders;
3. Warning shots are prohibited;
ATTENTION CEO: Some rural law enforcement agencies permit the firing of warning shots. If warning shots are permitted, officers must be trained regarding the proper use of warning shots.
4. Officers shall not fire their weapons from a moving vehicle or at a moving vehicle except as allowed under S.O.P. 12-2; and
5. Facts unknown to an officer, no matter how compelling, cannot be considered in later determining whether the use of lawful force, particularly that of deadly force, was justified.
http://www.dca.state.ga.us/research/law/Chap11_PurReg.html