But when officers arrived Castanos, who has a history of violence and five warrants out for his arrest, fled the scene, jumping over a fence in a bid to escape.
Argo immediately gave chase and caught up with the suspect, latching on to his left arm, exactly as trained to. But Castano reportedly pulled a knife and stabbed the dog six times; he then moved toward one of the officers, the Fresno Bee reported.
Argo, who was also bitten by a pit bull during the arrest, suffered wounds to his back and left eye. The two-year vet was rushed to the vet's, where he underwent emergency surgery.
Thankfully, he is expected to survive and fully recover.
On Monday Fresno PD posted an update, revealing Argo — fully shaved and boasting several visible battle wounds — had been released from the vet hospital on Sunday morning, adding: "He is back home and slowly recovering."
We want to give an update on Argo, our K9 friend who was injured over the weekend. Argo was released from the Vet Hospital yesterday morning. He is back home and slowly recovering. pic.twitter.com/R5jXnIMesa