The accidental fentanyl exposure hit San Diego County sheriff’s Deputy David Faiivae quickly. It was an overdose. *** Faiivae’s near-fatal overdose on July 3 was the subject of a 4-minute video released by the Sheriff’s Department on Thursday. The incident became part of the latest public warning about fentanyl, a drug blamed for 461 fatal overdoses in San Diego County in 2020 and which officials warn could kill 700 in 2021. The drug is an increasing problem among inmates in county jails as well. *** In the body camera video, Faiivae’s training officer, Cpl. Scott Crane, tells him the substance...