And the prosecutor will make the final decision about whether anyone will be formally charged.
Perry was a psychiatric patient who was found dead in the amphitheatre at the hospital last February.
Police have said all along they had a suspect in her death but no arrest has ever been made.
Perry's family has been critical about the length of time this is all taking and the lack of information they have received on what's going on.
Perry's mother recently was asking people to sign a petition outside the hospital calling for better security inside.
