Two horses in rural Owyhee County, Idaho, were dragged to death last weekend, after the driver of a pickup truck left a team-roping competition without realizing they were tied to the back of his trailer.

Sheriff Gary Aman says the deaths of the quarter horses appears to be an accident.

The driver told him that he’d had a couple of beers, fell asleep in his truck, woke up, and then drove away.

The owners of the horses had apparently tied the animals to the trailer, then gone for something to eat.

While the man may have been intoxicated, Aman says he only learned of the incident days later, so charges won’t likely be filed