Changed name so that can't be linked to other threads I've been on!
I find it fascinating how people think LoD is in any way realistic! I am a DC on an ACU. I've only recently caught up on LoD as my DH banned me from watching it with him as I shout at the tele too much 

What annoys me is that the writers go to effort of using correct terminology (such as CHIS) but then get other details soooo wrong! My biggest pet hate is that every suspect interview in every series has been AWFUL!! For many different reasons. Real interviews are nothing like this. And for this latest one, as well as an appropriate adult there would also be an intermediary to ensure Terry understood questions properly.
Also, there is no rule that officers are entitled to be interviewed by a person at least one rank above! That is complete nonsense... I have no idea why this has become a thing throughout the series. For a start, inspectors and above never interview anyone!!
And my last little rant.. the Police regs changed at the beginning of 2020 so I'm expecting every mention of the police regs to be wrong in this series!