Robert Luna December 5, 2022 6:05 pm Robert Luna's First Day as LA County Sheriff Robert Luna began his first day as the new Los Angeles County Sheriff with a speech for Angelenos. Angie Crouch reports for the NBC4 News on Dec. 5. US & World Videos 3:15 President Biden arrives in LA for fundraiser 1:30 Woman armed with knife shot and killed by police in Panorama City 3:23 Procession honors fallen firefighter killed while on the job in Palmdale 3:05 El Monte hosts ‘Honor Guard Watch' for fallen officers 2:16 Dodgers celebrate LGBTQ+ community with Pride Night