What special training, demeanor, and other conditions should be considered by the police department interviewers?

Special populations

Amend the general order to include caution, techniques, and skills authorized for use in obtaining statements from special populations (e.g., children, elderly, and the mentally challenged).

What special training, demeanor, and other conditions should be considered by the police department interviewers?

Do not forget about proposing possible themes on how to approach certain populations when seeking their information.
Read the literature, and do some scholarly research to develop your addendum to the earlier general order.