Arcangelo Caressa, Bruno’s trainer and friend, made an ominous promise to the killers after he found the seven-year old bloodhound in a pool of blood on Friday.

Bruno, a seven-year-old dog known to help find missing and vulnerable people, was found dead in his shed in Italy. It was later revealed that he died from internal bleeding after eating sausages laced with hidden nails.

The horrific killing of a police bloodhound has outraged Italians and sparked a criminal investigation to find his killers.