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. A southern California family is devastated after a sheriff’s deputy shot and killed their beloved rottweiler “Daisy.” KTLA 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.…