A Chicago school is reeling after learning one of its teachers has been charged with the beating death of a dog he was supposed to have rescued.

Chicago Public School teacher, Derek Fierro, 25, reportedly called 911 to report the death of his rescue dog, Doc, a Labrador-Chow mix he rescued from the Chicago Canine Rescue Foundation.

Fierro admitted to punching Doc to death. When officers arrived, Fierro was reportedly crying as he led them to the trunk of his car, where he had placed the dog’s body.

He told police he repeatedly punched the dog after he grew frustrated while attempting to give the dog a bath after he defecated on himself.

The Rescue Foundation said it was devastated to hear the news, saying everyone who adopts a dog from them are told they have the option to bring the dog back to them should there be a problem.

‘If he had called us last night we would have figured out a way to pick that dog up,’ foundation spokesperson, Lisa Lotnia told the Chicago Sun-Times. ‘We try to do the right thing, and it’s devastating to have this happen.’

Fierro, a 4th grade teacher at Eugene Field Elementary School in Chicago’s Roger’s Park neighborhood, has been charged with felony aggravated cruelty to animals.

His bond was set at $200,000 and as a special condition of his bail, Fierro is not allowed to possess or have contact with any animals. His next court date is scheduled for August 17.

Doc was rescued by the foundation after he was abused by a previous owner. Fierro had to fill out a 3-page application to adopt the dog who was only about 14 or 15 months old. He was one of seven taken from an Oklahoma shelter last year. He was named after one of the Seven Dwarfs of the Snow White story.