"He was sleeping in a friend's truck when someone saw him and called the police," Wilson said. "He's had his problems with alcohol, but he's a compassionate kid."

The subpoenaed video shows three men escorting Wilson to a cell at the Osage County Jail. When Wilson turns around and extends an open hand toward one of the officers, he fires the Taser at his upper body.

"The reason people get away with this kind of thing is because we allow them to," Wilson said. "And I don't think that's what law enforcement's about, I don't think that's what justice is about, and I don't think that's what this country is about. We have a Constitution, we have a Bill of Rights, but in cases like this, it doesn't matter."

Wilson said his son had a pre-existing heart condition and other health problems when authorities used the Taser.

"He's a young man recovering from a broken back and punctured lungs," Wilson said.

Nurse Renee Kietz said firing a Taser at someone's chest can cause heart irregularities.

"If the electricity can pass through the heart, or close to the heart, there would be the potential for an abnormal rhythm or a disturbance in the heart's regular pacing," Kientz said.

In April 2008, Taser International stated in a written product warning to law enforcement  that the device's "Targed Preferred Areas of the Body" included "the subject's torso (center mass) or legs". But in October 2009, Taser issued a press release that said law enforcement officials should avoid chest shots when possible.

Still, Kientz said she thought the footage of Wilson showed "torture."

"I still have a sick feeling in my stomach from watching that video," Kientz said.