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WATCH: Shocking Video Of Horse Being Forcibly Dragged By Car

WARNING: Distressing content. Two people have been charged after a video showed a horse being dragged behind a pickup truck.

The disturbing video, filmed in the U.S. state of Colorado, was posted on Facebook on Sunday where it sparked outrage across the world.

The Grand Canyon Sheriff's Office said a 59-year-old man and 33-year-old woman have both been charged with one count of animal cruelty. The pair will appear in court in late January.

Numerous people contacted the Grand County Sheriff's Office about the video, prompting the investigation.

The horse, named Trigger, was then seized by authorities and taken to a veterinary hospital for evaluation by animal welfare officers. The couple's two other horses have not been seized.

The moment before the horse was dragged down the road. Image: CBS News.

"Our phone lines and email accounts are getting covered up with inquiries from people interested in the case," Matt Karzen of the Grand Canyon Sheriff's Office said.

The woman who owns Trigger and her partner agreed to be interviewed by CBS Denver off-camera from her home in Grand County on Monday, but did not want to be identified.

Sounding distraught, she said she knows the treatment was wrong.

"I've lost my job over this, I've upset a lot of people. I made our horse go through something that he shouldn't have. I was wrong."

The shocking moment the horse was dragged along the road. Image: CBS News.

The video shows the horse being pulled for about 100 metres on a snowy road as the animal resists.

"I'm very sorry. I get why people are upset," Trigger's owner said.

"I was so stupid, I don't know why we did it."

On Monday, President Trump signed the Preventing Animal Cruelty and Torture Act, or PACT Act, into law, making animal cruelty a federal crime for the first time.