UPDATE: The accused dog beater has been identified as an animator for DreamWorks, having worked on animal-themed films including “Kung Fu Panda,” “Shark Tale,” “Bee Movie” and “Madagascar 2″.

UPDATE 2: Prosecutors now claim after he killed the dog, he carried off its body.

The abuse of an animal never makes any sense. This particular abuse case however, makes the least sense of all.

In what local Humane Society officers called the worst case of animal abuse they’ve ever seen, a 40-year-old Pasadena, California man was booked Wednesday on suspicion of repeatedly beating a muzzled German Shepherd while it was leashed to a fence.

Young Song was arrested at his home on suspicion of felony animal cruelty in connection with the brutal attack on the 14-month-old dog, which was caught on videotape.

Song is being held on $40,000 bail at the Pasadena City Jail.

The beating was captured by a security camera the dog’s owner mounted outside his home, said Ricky Whitman, Pasadena California Humane Society spokeswoman,.

“When our officers first viewed the videotape, one of our officers had tears in his eyes. He’d never seen anything like this before,” said Steve McNall, who heads the Pasadena Humane Society and Society for the Prevention of Cruelty to Animals. “In my 31 years at this animal shelter I’ve never seen anything like this.”

In the video, the suspect is seen scaling the back of his neighbor’s home in Pasadena, California on April 20, shooting the Shepherd with a pellet gun and beating it while it was leashed to a fence and muzzled, according to Whitman’s description.

It was unclear what type of weapon was used to beat the animal, she said.

The dog went missing after the attack, Whitman said.

“It’s a strong possibility that he killed the animal, and we have strong evidence that he knows about the whereabouts of the dog,” she said. “It looks like he did something with the severely beaten animal, but we don’t know where the dog is. We hope to find out soon.”

Pasadena, California police and Humane Society officers served a search warrant Wednesday at Song’s home.

“We found evidence, strong evidence, related to the case. But we are still investigating and do not want to release information on what was found in the house,” said Lt. Nemesio Arteaga of the Humane Society.

One of Song’s neighbors was “shocked” by Song’s arrest, saying he is a husband and a father.

“He’s a very nice and kind person,” said Paul Lofthouse, who lives directly across the street from Song. “He must have snapped. He has three dogs of his own and chickens in the backyard. It’s a total surprise.”

Story By Elaine Furst For Dog Files