Perez said he never saw any aggressive behavior from the dog. He said the attack was completely out of the family's control.
"There's pictures that show the baby with the dog at one point. This dog was a family dog just like any other dog. What can you do if the dog just lost it for an instant?" Perez said.
He told ABC-7 this is just more stress for a family who has already gone through enough.
"It's unreal. Where does this end? Where does it stop? This is nothing that was in their control," Perez said.
Shortly before 11:30 a.m. Tuesday, May 8, Las Cruces Police were called to the Mesa's residence by a neighbor who reported hearing Leticia Mesa screaming for help. The neighbor, 69-year-old Barry Snyder, saw that the 2-year-old dog named Tyson was attacking the girl and that Leticia Mesa was trying to cover the child.
Snyder retrieved a .45 caliber handgun from his home, called 911 and went to the aid of the girl and her grandmother. Detectives learned that Snyder entered the backyard and fired the first shot as the pit bull aggressively closed distance on him. The initial shot is believed to have missed the dog and instead struck Leticia Mesa's thigh and foot.
Snyder fired four more rounds at Tyson as it ran to a side yard. Snyder followed Tyson and fired two more rounds which proved to be fatal for the 90 pound pit bull.
Jazilyn Mesa was rushed to Mountain View Regional Medical Center in Las Cruces where she succumbed to her injuries. Leticia Mesa was transported to University Medical Center of El Paso.
"There are no words I can say," the baby's grandfather Arturo Mesa told ABC-7, with tears welling in his eyes in May. "I loved her dearly. She was my baby."
In May, Arturo Mesa told ABC-7 that Tyson was 2-years-old and had never bitten anyone before. He said baby Jazilyn was never allowed to be alone with Tyson. He said he could never have imagined something like this could happen.
"The baby wanted to go outside, and play," Arturo Mesa said in May, sitting in the backyard where the baby was mauled. "So the procedure was, put the dog away because he's big, and played rough. So that's what they were doing -- taking the dog and putting it in the kennel. And it attacked."
The New Mexico medical investigator's office ruled that Jazilyn Mesa, who weighed only 23 pounds, received multiple injuries to her head, face, torso, arms and legs. All of the injuries were consistent with those of a dog attack.
Leticia Mesa was booked into the Dona Ana County Detention Center with bond set at $15,000. Bond for Arturo Mesa Sr. and Jesus Mesa was set at $10,000 each.
All three bonded out of jail on Tuesday. They did not want to give any comments when they got home.