A 20-year-old woman has been left brain dead - after she was Tasered by police and smacked her head on the ground.

Danielle Maudsley had been taken to a Florida Highway Patrol Station after being arrested for a suspected hit-and-run in September. Handcuffed, she ran out of the door.

But as footage from a police cruiser dashboard camera reveals, Trooper Daniel Cole, who this week was cleared of any wrongdoing, fired a Taser's electric probes into her back.

She spun, fell backwards and hit her head on the ground. Bleeding and crying she tried to get up. She then blacked out and has remained unconscious ever since.

Doctors say Danielle, who was found to have cocaine and oxycodone in her system at the time, is unlikely to ever wake up.

Her mother Cheryl has slammed the Department of Highway Safety and Motor Vehicles and Florida
Department of Law Enforcement for its reports that both cleared Cole.

She told the Tampa Bay Times she was suing FHP, and added: 'Tell me that's not excessive force. I'm not saying she was an angel, but she didn't deserve that.