I think that many TV dramas would lose their impact if they had to conform to the rules of real life, GG!
There are countless episodes of series such as Morse and Frost, where the hero finally confronts the villain in his own home (or somewhere else, other than a police station) and asks him about why he committed the crime, how he carried it out, whether he really expected to get away with it, etc, etc. The heroes never bother to caution the villains first and there's never any record of their conversations made. So much for the provisions of PACE!