Fresno Deputy Police Chief Keith Foster has been arrested on federal drug charges, the FBI announced Thursday.
Foster was one of six persons arrested in connection with an alleged illegal drug conspiracy. He faces charges of conspiracy to distribute and/or possession with the intent to distribute oxycodone, heroin and marijuana, the FBI said in a prepared statement.
The arrests resulted from a year-long investigation by the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives.
Foster joined the Fresno Police Department in December of 1986 as a police officer recruit and worked his way up to deputy chief. He has been commander of the Patrol Division since March 2013.
Foster will be on paid administrative leave while the Fresno Police Department conducts an internal investigation of the alleged crimes and possible department policy violations.
"This is a very sad day for the Fresno Police Department, the citizens of Fresno, the law enforcement profession, and for me personally," Fresno Police Chief Dyer said in the statement. "Our department will continue to serve in a professional manner and to do all we can to maintain the trust and confidence of this community."
This story has been updated.