Section 441.676 - Investigation of licensing violations; powers of investigator(1) For complaints of licensing violations other than abuse, the Department of Human Services shall cause an investigation to be completed within 90 days of the receipt of the complaint.(2) Except in cases where the investigation is part of nursing facility surveyor activity pursuant to federal law, an investigator investigating a complaint other than a complaint of abuse shall: (a) Make an unannounced visit to the facility, while complying with ORS 441.690;(b) Interview all available witnesses identified by any source as having personal knowledge relevant to the complaint, such interviews to be private unless the witness expressly requests the interview not to be private;(c) Make personal inspection of all physical circumstances that are relevant and material and that are susceptible to objective observation; and(d) Write an investigation report that includes: (A) The investigator's personal observations;(B) A review of documents and records;(C) A summary of all witness statements; and(D) A statement of the factual basis for the findings for each incident or problem alleged in the complaint.