Wednesday, December 8, 2010 – 03:45 p.m.
Last Updated: December 9, 2010 – 06:45 a.m.

Sources tell The Insider a federal grand jury has convened to examine evidence and hear testimony related to the ongoing investigation into possible illegal activities involving public officials at San Bernardino County-owned and operated Arrowhead Regional Medical Center. (ARMC)

Last month federal investigators raided the facility and recovered boxes of documents and conducted interviews of department heads.

Sources confirm that interviews were conducted by federal agents.

Federal investigators have focused on medical treatment afforded to elected and other public officials at the hospital.

Allegation involving threats and intimidation of medical staff have surfaced during the investigation.

Sources indicate ARMC employees are appearing in response to previously served subpoenas for official grand jury activities, which commenced Wednesday.