A car decal in memory of Doug Wiggington is shown on the back window of his daughter, Taylor Wiggington's car in Greenfield, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Brittany Osberry and her son Kannon sit in the living room of their home in Lima, Ohio, U.S., December 23, 2017. Picture taken December 23, 2017. REUTERS/Paul Vernon To match Special Report USA-TASER/VULNERABLE 

Taylor Wiggington stands near the spot where her father, Doug Wiggington, was shocked by a Taser on May 12, 2017, in Greenfield, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

The Greenfield Police Department station is shown in Greenfield, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Taylor Wiggington gets emotional while walking through the area where her father, Doug Wiggington, was shocked by a Taser on May 12, 2017, in Greenfield, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Taylor Wiggington gets emotional while walking through the area where her father, Doug Wiggington, was shocked by a Taser on May 12, 2017, in Greenfield, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Taylor Wiggington gets emotional while walking through the area where her father, Doug Wiggington, was shocked by a Taser on May 12, 2017, in Greenfield, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Brittany Raftery and her sister Taylor Wiggington stand for a portrait just outside Wiggington's home in Indianapolis, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Brittany Raftery and her sister Taylor Wiggington stand for a portrait just outside Wiggington's home in Indianapolis, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

Brittany Raftery and her sister Taylor Wiggington sit in Wiggington's living room at her home in Indianapolis, Indiana, U.S., December 21, 2017. Picture taken December 21, 2017. REUTERS/Lucas Carter To Match Special Report USA-TASER/VULNERABLE 

The Franklin County Corrections II facility is seen in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Rose West, whose daughter Wende had a taser used on her while in custody by the Franklin County Sheriff's Department, closes her eyes as she watches a video of the incident, in her home in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Rose West, whose daughter Wende had a taser used on her while in custody by the Franklin County Sheriff's Department, speaks to Reuters in her home in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Kerstin Sjoberg-Witt, the director of advocacy for Disability Rights Ohio, is seen at the group's office in Columbus, Ohio, U.S, October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Rose West, whose daughter Wende had a taser used on her while in custody by the Franklin County Sheriff's Department, holds a ring given to her by her daughter while she speaks to Reuters in her home in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Rose West, whose daughter Wende had a taser used on her while in custody by the Franklin County Sheriff's Department, speaks to Reuters in her home in Columbus, Ohio, U.S., October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Rose West, whose daughter Wende had a taser used on her while in custody by the Franklin County Sheriff's Department, watches a video of the incident in her home in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Martini Smith, who had a taser used on her while in custody by the Franklin County Sheriff's Department, speaks to Reuters in her home in Columbus, Ohio, U.S. October 11, 2017. Picture taken October 11, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Martini Smith, who had a taser used on her while in custody by the Franklin County Sheriff's Department, speaks to Reuters in her home, in Columbus, Ohio, U.S. October 11, 2017. Picture taken October 11, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Rose West, whose daughter Wende had a taser used on her while in custody by the Franklin County Sheriff's Department, watches a video of the incident in her home, in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Kerstin Sjoberg-Witt, the director of advocacy for Disability Rights Ohio, is seen at the group's office in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

The Franklin County Corrections II facility is seen in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Natasha Nance (L) talks about the events the night her nephew, Tory, died as Quinta Sanders, Tory's mother, reacts in the living room of her home while speaking with Reuters in Nashville, Tennessee, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Harrison McClary 

Martini Smith, who had a taser used on her while in custody by the Franklin County Sheriff's Department, speaks to Reuters in her home in Columbus, Ohio, U.S. October 11, 2017. Picture taken October 11, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Martini Smith, who had a taser used on her while in custody by the Franklin County Sheriff's Department, shows one of the scars she has from the incident in her home, in Columbus, Ohio, U.S. October 11, 2017. Picture taken October 11, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

The Franklin County Corrections II facility is seen in Columbus, Ohio, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Natasha Nance, Quinta Sanders, the mother of Tory Sanders, friend Tiffany Reynolds and Summer Barrett, widow of Tory Sanders, sit in the living room of Quinta's home while speaking with Reuters in Nashville, Tennessee, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Harrison McClary 

Quinta Sanders and friend Tiffany Reynolds sit in the living room of Sanders' home while speaking with Reuters in Nashville, Tennessee, U.S. October 10, 2017. Picture taken October 10, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Harrison McClary 

Martini Smith, who had a taser used on her while in custody by the Franklin County Sheriff's Department, speaks to Reuters in her home in Columbus, Ohio, U.S. October 11, 2017. Picture taken October 11, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

Flowers adorn Corey Carter's gravesite in Wright City, Oklahoma, U.S. October 25, 2017. Picture taken October 25, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Charles Levinson 

Martini Smith, who had a taser used on her while in custody by the Franklin County Sheriff's Department, is seen in her home in Columbus, Ohio, U.S. October 11, 2017. Picture taken October 11, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Paul Vernon 

The sign for the Franklin County Sheriff Department and Jail, where Cody Franklin was tasered, is displayed by its front door in Ozark, Arkansas, U.S. October 18, 2017. Picture taken October 18, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Peter Eisler 

The Franklin County Sheriff Department and Jail, where Cody Franklin was tasered, is shown in Ozark, Arkansas, U.S. October 19, 2017. Picture taken October 19, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Peter Eisler 

Veda Carter, mother of Corey Carter, sits on the porch of her home in Valliant, Oklahoma, U.S. October 25, 2017. Picture taken October 25, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Charles Levinson 

Clayton and Teresa Franklin, parents of Cody Franklin, sit in their lawyer's office in Greenwood, Arkansas, U.S. October 19, 2017. Picture taken October 19, 2017. To Match Special Report USA-TASER/JAILS REUTERS/Peter Eisler 

An X2 Taser gun is shown on display at the Taser booth during the International Association of Chiefs of Police conference in San Diego, California, U.S. October 17, 2016. Picture taken October 17, 2016. To match Special Report USA-TASER/X26 REUTERS/Mike Blake 

An X26P Taser gun is shown on display at the Taser booth during the International Association of Chiefs of Police conference in San Diego, California, U.S. October 17, 2016. Picture taken October 17, 2016. To match Special Report USA-TASER/X26 REUTERS/Mike Blake 

An X26P Taser gun is shown on display at the Taser booth during the International Association of Chiefs of Police conference in San Diego, California, U.S. October 17, 2016. Picture taken October 17, 2016. To match Special Report USA-TASER/X26 REUTERS/Mike Blake 

An X26P Taser gun is displayed at the Taser booth during the International Association of Chiefs of Police conference in San Diego, California, U.S. October 17, 2016. Picture taken October 17, 2016. To match Special Report USA-TASER/X26 REUTERS/Mike Blake 

Montgomery County, Maryland police officer and instructor Craig Dickerson fires an X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Red laser markings on target show the preferred target zone. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

Montgomery County, Maryland police officer and instructor Sergeant Michael Stull displays the probe from a taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

A target shows the effects from an X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

Montgomery County, Maryland police officer and instructor Craig Dickerson demonstrates an X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Picture taken September 7, 2016. USA-TASER/SCIENCE REUTERS/Gary Cameron 

Former Taser master instructor with the Oakland Police Department Mike Leonesio speaks in his home in Athens, Tennessee, U.S, February 24, 2017. Picture taken February 24, 2017. To match Special Report USA-TASER/SCIENCE REUTERS/Peter Eisler 

Montgomery County, Maryland police officer and instructor Craig Dickerson fires an X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

Montgomery County, Maryland police officer and instructor Craig Dickerson fires an X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Red laser markings on target show the preferred target zone. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

Montgomery County, Maryland police officer and instructor Craig Dickerson fires an X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Red laser markings on target show the preferred target zone. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

A target shows the effects from a X2 taser during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

Former Taser master instructor with the Oakland Police Department Mike Leonesio speaks in his home in Athens, Tennessee, U.S. February 24, 2017. Picture taken February 24, 2017. To match Special Report USA-TASER/SCIENCE REUTERS/Peter Eisler 

Former Taser master instructor with the Oakland Police Department Mike Leonesio speaks in his home in Athens, Tennessee, U.S. February 24, 2017. Picture taken February 24, 2017. To match Special Report USA-TASER/SCIENCE REUTERS/Peter Eisler 

Former Taser master instructor with the Oakland Police Department Mike Leonesio speaks in his home in Athens, Tennessee, U.S. February 24, 2017. Picture taken February 24, 2017. To match Special Report USA-TASER/SCIENCE REUTERS/Peter Eisler 

(Clockwise L-R) Two X2 tasers and their respective cartridges, two X26 tasers and their respective cartridges, and the probes that pierce clothing and skin, are seen during a demonstration for Reuters at the department's training academy in Rockville, Maryland, U.S. September 7, 2016. Black tasers are used for SWAT teams; yellow tasers for general police street use. Picture taken September 7, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Gary Cameron 

Attorney John Burton poses in his office in Pasadena, California, U.S., July 14, 2016. Picture taken July 14, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Mario Anzuoni 

Attorney John Burton poses in his office in Pasadena, California U.S., July 14, 2016. Picture taken July 14, 2016. To match Special Report USA-TASER/SCIENCE REUTERS/Mario Anzuoni 

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USA-TASER/ - Explore Reuters’ database of more than 1,000 incidents in which people died after police stunned them with Tasers, often in conjunction with other force. 

USA-TASER/ - Overview of taser associated lawsuits and key company data. 

A look at the evolution of warnings issued by Taser International 

The headquarters for Taser International, the company now renamed Axon Enterprise Inc, is seen in Scottsdale, Arizona, U.S., October 16, 2016. Picture taken October 16, 2016. To match Special Report USA-TASER/EXPERTS REUTERS/Ricardo Arduengo