BBC Sounds, Music, Radio, Podcasts.

Hello, today we've got something different for you.

We're going to answer questions that you've been sending us

since the series finished.

And to help me with this is Dr Julia Shaw.

She's a criminal psychologist and presenter

of the Awesome Bad People podcast on BBC Science.

And Bad People is all about dissecting criminal cases

that shock and intrigue us, cases like Sam's.

So, this is I'm not a monster from BBC Panorama

and Frontline PBS.

I'm Josh Baker.

Julia, before we begin, do you want to tell us a little bit

about yourself?

Because I think when we hear the term criminal psychologists,

it's like something we probably know as a phrase,

but what actually is that? What does that involve?

It can involve very different things,

so I have done some training specifically on the issue

of memory and interuse and interrogations.

So how to ask people the right questions

that aren't leading or suggestive, for example.

...