(1) Interview all available witnesses identified by any sources as having personal knowledge relevant to the complaint;
(2) Make personal inspection of all physical circumstances that are relevant and material to the complaint and which are susceptible of objective observation;
(3) Not decline to interview a witness or consider the testimony of the witness solely because the witness is neither a health care professional nor an employee of the facility; and
(4) Write a report which 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 basis for the finding. [1981 c.241 §2]