Phoenix police are investigating a startling animal-cruelty case in which a 6-month-old Chihuahua was found cut in half.

The distraught Medina family had to remove photos of their dog "Taco" from the walls of their Phoenix home after the dog's owner, Humberto Medina, made the gruesome discovery.

Medina said the photos are too painful to look at because his last memory of Taco was of the pet torn in two pieces in their backyard.

Medina believes the crime was racially motivated.

"I don't understand why they did (this)," Humberto Medina told "He was just a little dog. He cannot hurt anybody."

Detective Stacie Derge said the Phoenix Police Department does not have any suspects for the crime.

She did not have further details to release.

Anyone with information is asked to call 602-262-6151 or Silent Witness at 480-WITNESS.

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The Associated Press contributed to this report.