"He's taking it like a champion."

That's what a Pinal County Sheriff's deputy allegedly told another officer as he held a stun gun to a frog's back.

The officer, Deputy Raul Alvarado, was fired after he allegedly zapped the frog, but the Sheriff's Office was forced to take him back after he appealed to the county's merit commission.

KPHO got its hands on the internal investigation of Alvarado, and it tells the tale of how the deputy regards frogs -- and apparently sexual relationships between humans and amphibians, too.

The investigation shows that Alvarado held the stun-gun to the frog's back for five seconds. A deputy who witnessed the electrocution says the jolt caused the frog's legs to shoot straight out.

Alvarado allegedly told a female dispatcher that he planned to take the frog into the desert and perform sexual acts on it, too.

After the PCSO got word of Alvarado's alleged relationship with the frog, it conducted an internal investigation and ultimately fired him.

Alvarado appealed his termination to the merit commission, which ruled he shouldn't have been axed because the results of a polygraph test the officer took were inconclusive. The merit commission concluded that the county couldn't prove its case.

The Sheriff's Office has asked the Pinal County Superior Court to uphold the firing.

The Casa Grande Police Department conducted its own investigation of the deputy and recommended he be charged with felony animal-cruelty charges.

However, any charges are yet to be filed by the Pinal County Attorney's Office.

Check out the KPHO story here.