A married Texas couple   were criminally charged after their animals killed an 81-year-old man and injured three other people.

Investigators believe the couple had trained their dogs to be aggressive prior to the fatal attack. 

Christian Alexander Moreno and Abilene Schnieder of San Antonio, were both arrested after the Feb. 24 fatal mauling of Air Force Veteran Ramon Najera Jr. 

Moreno and Schnieder, both 31, face felony charges of a dangerous dog attack causing death and criminal neglect causing the injury of an elderly person after two of their dogs escaped from their yard and unleashed fury. The couple remained jailed Friday on $125,000 bond each, a San Antonio Police sergeant said.

Najera was killed and his 74-year-old wife and two other people were injured in the attack, police reported.

The ambush came after weeks of increasingly violent behavior by the dogs and investigators believe the couple were encouraging the behavior through training, an arrest affidavit shows.

Police received multiple tips the couple had “been breeding the dogs and training the dogs to be aggressive with meat,” the affidavit reads.

According to the affidavit, Moreno told investigators he had complied with the city’s Animal Control Services (ACS) guidelines to keep the animals leashed, but a witness video showed the dogs were not wearing collars.

“First and foremost, the most important part is to the family. To say we are sorry. It was heartbreaking to see the whole incident go down,” Schnieder told local News 4 before her arrest Wednesday.