Arrowhead is host to a 24-hour emergency room and the Inland Empire's only burn unit. It's a hospital that has earned a "seal of excellence" for it's patient safety.
But on Thursday a team of FBI agents and District Attorney investigators arrived in county vehicles and unmarked law enforcement cars. The group quietly slipped inside both the hospital and it's medical offices to serve a search warrant.
Boxes of unidentified files were then loaded into the vehicles as agents combed the property.
NBCLA has learned that the documents were seized in an effort coordinated by the DA's Joint Corruption Task Force.
All the district attorney's office would officially say was that the investigation does not involve the quality of patient care or treatment. There was no comment from hospital administrators.
Laura Eimiller, spokeswoman with the FBI, said she couldn't discuss the nature of the warrant because the FBI was only called to assist local authorities, the Press Enterprise reported.
"I imagine they're seeking evidence for the furtherance of an investigation," she said, as reported by the Press Enterprise.
Jorge Valencia, a spokesman for the county hospital, declined to comment on the raid, as reported by the Victorville Daily Press.
But speculation from three sources close to the investigation was that the documents may have involved at least one elected official who had surgery at Arrowhead and had not paid the bill.
Hours after the raid, no one had been arrested, but news of the warrant, or the rumor that someone could get treatment and not pay, did not sit well with other patients or employees.
"I think that's out of hand right now. If that is what's going on, I think that's really out of hand. Free medical insurance. This is a county hospital, so it wouldn't be fair at all," says Odesbah Perkins, a LVN Student
"Wow, that's just not right. Considering those of us who do work don't get the medical care that we need," says Susan Weller, a patient.
"Well I don't think that's fair. Working people work every day for their benefits, and I just don't think that that's fair to the American people," according to Darlene Brown, a Colton Resident.