Image copyright Jenny Coleman/Oregon Innocence Project Image caption Mr Horner was freed with the help of the Oregon Innocence Project after he appealed for their help while in prison

A man from Oregon has been freed from a 50-year jail term after his case unravelled following the discovery of a labrador dog he allegedly killed.

Joshua Horner, 42, was convicted in 2017 for alleged child sexual abuse.

The complainant in the case had said Mr Horner shot the labrador in front of her in order to deter her from reporting his crimes to the police.

But the dog was discovered living with new owners by the Oregon Innocence Project, who were reviewing his case.

The original trial had not had a unanimous verdict and the non-profit legal organisation said their review of the trial evidence had raised "several red flags".

They originally raised concerns with a local district attorney, John Hummel, about Mr Horner's case in April, who agreed to work with them on a joint basis.

A critical discrepancy regarded the dog's whereabouts. Mr Horner insisted the dog was still alive, evidence that could prove the alleged victim had lied in her allegations.

An Oregon Innocence Project's investigator and a member of the local district attorney's office made a number of trips to try to hunt down the dog's new owner.

They eventually found him and the dog miles away on the state's coast.

Image copyright Jenny Coleman/Oregon Innocence Project Image caption The group were able to track down the dog at Mr Horner's request

"She was drinking a bowl of water and sitting in shade underneath a porch. We played with her. Petted her. It was wonderful," Lisa Christon, a volunteer for the legal organisation, said.

The dog's identity was reportedly verified through her distinctive appearance and evidence about her custody.

"Lucy the dog was not shot. Lucy the dog is alive and well," the district attorney's office said in its motion to dismiss.

"My investigator and the investigator from the Oregon Innocence Project tracked down Lucy the dog, verified her identity, spent much time with her, and took pictures of her."

A decision at the state's Court of Appeals allowed Mr Horner to be freed initially in August, and a new trial was ordered.

Attempts had been made to speak to the complainant about her testimony, but she allegedly failed to turn up for meetings and ran away from district attorney staff when approached, the AP news agency reports.

It was then confirmed there would be no second trial and Mr Horner was able to walk free alongside his wife Kelli.

In a statement released by the Oregon Innocence Project, he thanked its volunteers and the district attorney for co-operating with the group.

He said he and his wife were now "ready to pick up the pieces of our lives" following his release.