Dog that killed 3-day-old baby in San Diego is euthanized

FILE - This undated file photo provided by the San Diego County Department of Animal Services shows a male American Staffordshire terrier-mix named Polo, in their custody after it mauled to death a 3-day-old boy, in San Diego. The autopsy, released Monday, April 25, 2016, by San Diego County's medical examiner, found that the newborn boy mauled to death by the family dog died from bites to his head and also ruled the death of 3-day-old Sebastian Caban an accident. Authorities say the newborn was in bed with his parents and the dog Thursday night, April 21,when the mother coughed, startling the animal and prompting the attack. (San Diego County Department of Animal Services via AP, File) Original published by Associated Press

SAN DIEGO (AP) — A family dog that killed a 3-day-old San Diego boy has been put down at the owners' request.

San Diego County animal control officials say the dog, Polo, was euthanized Wednesday morning.

The 2-year-old male was an American Staffordshire terrier-mix.

Authorities say the dog was in bed with Sebastian Caban and the baby's parents, who were watching TV, on April 21 when the mother suddenly coughed.

Authorities say that startled the dog and it bit the baby in the head.

The couple pulled the dog off the child. The parents made two unsuccessful 911 calls before becoming frustrated and driving Sebastian to the hospital, where he was pronounced dead.

The death has been ruled accidental.

Jarec Cheong