Psychology is a the study of human behavior in general. Psychologists need not be bound by Hippocratic Oath. You for example have Ph.D. psychologists who spend their knowledge designing ergonomic products. They have no Hippocratic Oath they are bound to follow.
Further no psychiatric residency program teaches interrogation. I'm sure there's plentiful data of it in various psychology texts.
I think the news above is appropriate. Whether we admit to it or not, interrogation is a needed thing in warfare. Better to leave a healer out of interrogation.