Investigators in Oroville locate pill lab and illegal assault rifle during search warrant Authorities arrested one man Tuesday after a search warrant revealed a pill lab and an illegal assault weapon. Posted: Jan 12, 2021 5:33 PM Updated: Jan 13, 2021 8:42 AM Posted By: Ricardo Tovar OROVILLE, Calif. – Authorities arrested one man Tuesday after a search warrant revealed a pill lab and an illegal assault weapon. On Jan. 12, 2021, Detectives from Butte Interagency Narcotics Task Force (BINTF) with assistance from Butte County Sheriff’s Office Special Enforcement Unit (SEU) served a search warrant on the 1400 block of 21st street in Oroville. The premise where Alex Herrera, 41, was found in was searched and detectives say they found firearms, one being an illegal assault weapon, a pill press, and items used to produce counterfeit pills like Oxycodone and other miscellaneous pills.