Federal officials say Detective John Saro Balian, 45, a Seal Beach resident, lied on multiple occasions to law enforcement agencies about his links to members of the Mexican Mafia and Armenian organized crime.
They allege Balian was in contact with several gang members, taking money from them in exchange for information and tipping them off about raids at marijuana grows. They also say he helped dispose of a firearm that was used in a shooting, and was involved in extortion plots.
They say he misled investigators with the FBI, the LAPD and Homeland Security about his relationships with those organized crime figures.
Balian was arrested at his home without incident.
If convicted of making false statements to federal investigators, he faces up to five years in federal prison.
The Glendale Police Department said it is cooperating with the investigation and Balian is on administrative leave without pay during the investigation.