[JeffAtlanta]

Since medical records were considered to be part of the "doctor/client privilege" neither they could be subpoenaed nor medical staff summoned and questioned, in order to build such a case.

I don't think this is correct. Currently, doctors must notify law enforcement if a gunshot victim comes in for treatment or if a suspected drunk driver in an accident comes in.

I always wondered how this didn't infringe doctor/patient privilege.

[WindOracle]

The same rules do not apply to Emergency Room patients, however Rush was not an emergency room patient.