Hurricane police Officer Ken Thompson on June 9 twice deployed a Taser on Brian Cardall on the side of State Road 59 near Hurricane after Anna Cardall called 911 to report her husband behaving erratically while having a bipolar episode.

The officer shocked Cardall, 32, once after he failed to respond to commands to get down on the ground, according to 911 call recordings of the incident. A second shock occurred when Cardall was on the ground.

A pregnant Anna Cardall, who had her 2-year-old daughter with her, witnessed the deployment.

Anna Cardall had told dispatchers her husband was unarmed, bipolar and had taken Seroquel, a medicine used to treat manic episodes. Cardall was naked and had been trying to direct traffic, the recording shows.

Cardall quit breathing and had no pulse after the officer used a Taser the second time, according to the recording.

According to an autopsy report, Cardall was between two officers and when he turned toward the officer with the [Taser], he was shot with the device. The barbs struck him just above the left clavicle and over the left chest. He fell to the ground [at least partially] and then tried to get up and received a second cycle from the (Taser), following which he became unresponsive."

Deputy Chief Medical Examiner Erik Christensen wrote that paramedics witnessed the Taser deployment and attended to Cardall less than a minute after the weapon's deployment. He was taken to Dixie Regional Medical Center in St. George, where officials pronounced him dead after an hour of resuscitation efforts, the report states.

The Cardall family has criticized the officer's handling of the situation, saying a Taser should not have been deployed. Peter Stirba, a Salt Lake City attorney representing the Hurricane Police Department during an investigation into the death, maintains the officer was justified in using the Taser.

Washington County Attorney Brock Belnap announced Thursday he will not prosecute the officer who deployed a Taser on Cardall.