The technique of invading personal space during interrogations is designed to increase the subject’s anxiety. If the subject does not show the increased anxiety or yield space, it shows that they are blocking off everything. You are very right about getting them to move to a different room or exposing them to a different detective weakening their defenses. This brought back memories and made me double glad I don’t need to deal with these type of individuals on a regular basis! Great analysis!

So glad they locked him up, His only concern was for himself. I read elsewhere that investigators found “violent porn” in computer backups. I believe porn can take people down slippery slopes, but that’s just me.