UPD officer was not justified in March 2020 use of deadly force, DA says District Attorney Sim Gill declines to file charges Posted at 12:38 PM, Mar 05, 2021 and last updated 2021-03-05 22:29:21-05 SALT LAKE CITY â A Unified Police Department officer was not justified in using deadly force in a March 21, 2020 incident that claimed a 28-year-old man's life, Salt Lake County District Attorney Sim Gill's office announced Friday. According to a news release from Gill's office, Officer Omar Flores fired shots that killed Bryan Ulysses Pena-Valencia following a police pursuit in Taylorsville. Flores was wearing a body-worn camera that morning, but the camera did not record the shooting, a letter from Gill's office says. Investigators determined the camera became detached from Flores' uniform as he chased Pena-Valencia over a backyard fence.