Two incidents this week in which police used Tasers to subdue nonviolent suspects have thrust the popular stun gun into the spotlight again and raised new questions about the device's use and potential misuse by law enforcement officials.
Monday, police in California shocked a 15-year-old autistic boy with a Taser. Two days later, during a speech by Sen. John Kerry, D-Mass., at the University of Florida, officers Tasered a 21-year-old student who refused to stop asking the senator questions.
The weapon -- used by some 11,500 police agencies in more than 44 countries, according to its manufacturer, Taser International -- has been criticized by civil rights groups for years. They have questioned Taser's status as a "nonlethal weapon" by pointing to incidents in which people who have been stunned later died.
While neither of the two suspects in this week's incidents died or were seriously injured, the cases have focused attention on the increasing use of Tasers by police and the widely varying ways that use is regulated.
Who can be shocked, under what circumstances, for how long, and how many times varies from state to state and department to department, a fact that critics say allows for abuse. Taser International, which offers no guidelines on use of the weapons, says this allows police agencies to tailor their use according to local guidelines and case-specific needs.
While on the face of it, shocking a 15-year-old autistic boy with 50,000 volts of electricity for "acting suspiciously" but nonviolently might seem over the top, the Orange County (Calif.) Sheriff's Department maintains the device was used for the boy's own good.
"The use of the Taser was definitely justified," Jim Amormino, a sheriff's department spokesman told ABC NEWS.com. "The deputy had two seconds of contact with the suspect before he started screaming and running into traffic."
"If he hadn't been Tasered, he could easily have been killed by a car. The suspect, the officers, drivers on the road and pedestrians all could have been at risk if the suspect continued into traffic," he said.
Many Taser incidents might well have otherwise required the use of lethal force, and they've thus saved lives, according to Richard Jerome, a lawyer and former Justice Department official who now consults on police accountability.
"Clearly, Tasers are a important tool for law enforcement," Jerome said. "They're used by police departments to lower the incidence of more serious use of force."
In the other incident this week, University of Florida President J. Bernard Machen Tuesday called the Tasering and arrest of student Andrew Meyer "regretful" and launched a university inquiry, calling on the state police to investigate.
Monday officers took down Meyer before a roomful of people after the college senior grabbed a microphone and asked Kerry a series of questions, including whether he'd been a member of Yale's secret society Skull and Bones.
After Meyer was on the ground and surrounded by officers, he is a heard to say, on a widely circulated video of the incident, "Don't Tase me bro!"
In another filmed incident that went viral on the Internet this week, an Ohio woman was Tasered earlier this month multiple times, including while handcuffed and seated in the back of a police cruiser.