A Southern California family is devastated after a sheriff’s deputy shot and killed their beloved rottweiler “Daisy” while investigating a stolen car report and they want answers.

A deputy with San Bernardino County Sheriff’s entered the backyard of Jesus Serna on Sunday May 4 when he wasn’t home, the department told The Post.

Surveillance video obtained by KTLA showed the deputy first being greeted by Raven, one of the family’s dogs, who wagged her tail as she approached the deputy.

The family’s other dog, Daisy, spots the deputy and starts barking. The officer then draws his gun and shoots Daisy, as she continued to approach him.

Serna and his family — who are not staying at the home while it’s under construction — are demanding justice for Daisy. The home owner said he wants to know why the deputy entered his property without permission and why he shot and killed Daisy.

“She was just defending her home,” Serna told KTLA. “I asked why they were there and they told me it was due to a vehicle being near my home that was stolen.”

“They attempted to knock on the door and then they let themselves in after.”

“The dogs have been with us for five years and are a part of our family,” Serna said. “It shows that the police department has no remorse for animals or literally anyone.”

The San Bernardino County Sheriff’s Office said the shooting is under review, and body-worn camera footage as well as surveillance footage will be reviewed.

“While searching the property, the deputy encountered a homeowner’s dog,” the statement read.

“During the encounter, the deputy discharged his firearm, striking the dog. A sheriff’s supervisor responded to the scene, along with Animal Control, and the homeowners were notified.”

It added, “The deceased dog was taken by Animal Control, along with a second dog that was off the property and wandering in the street.”

Serna said the car had no connection to him or the property and is shocked that the deputy killed Daisy.

“They randomly go into someone’s house and do whatever they want.”

The sheriff’s office also confirmed to The Post that the stolen vehicle parked in front of Serna house was not related to the property or him.