A next-door neighbor said she never heard Coco bark or growl at the officers.
Sandra Orozco, 27, said she was awakened by seven police officers in her backyard around 4:30 a.m. The officers then jumped the wall between the two yards, she said.
Orozco couldn't see the shooting while standing in her patio because the wall blocked her view, but she and her parents did hear two pops that she later learned were the fatal shots.
She said Coco was "always gentle" and played well with her 5-year-old daughter.
De La Torre, teary-eyed and surrounded by photos of the dog, said that was one of the reasons she adopted Coco.
She remembers first seeing him at the Lied Animal Shelter three years ago. While other dogs barked and jumped for attention, Coco didn't make a sound.