He had gone through training to ready himself for such a scenario. But Fish was not prepared for what was to follow.
He was put on trial and found guilty of murder. He was imprisoned. He faced the possibility of a civil trial from Kuenzli's family. He still finds himself in deep debt to pay his attorneys, who were able to get an appellate court to toss his conviction in 2009.
"What nobody teaches is what happens when you use that firearm," Fish said, speaking from his Glendale home. "They focus on you surviving the incident."
Fish's conviction was tossed out by the Arizona Court of Appeals, which ruled that the jury wasn't told enough about Kuenzli's violent past or the aggressive nature of the dogs and didn't get proper instructions about what constitutes an attack.
Fish was released from prison in July 2009. Prosecutors said they would not prosecute him again.
Upon his release, Kuenzli's sister, Linda Almeter, told The Republic that she didn't want Fish free and that he never took responsibility for his act. "My brother can never reclaim his life," she said.
Fish has his freedom, but he can't recoup the dollars he spent fighting the case. He took out a second mortgage on his house. Relatives did the same with theirs, including his retired father. Fish estimates he spent about $700,000 on legal fees. He expects he'll die before all of it is paid back.
Shooting someone is very expensive.