My first thought as well, as I posted below. Here's what I would recommend for a recording device...
I have one. Got it on the kickstarter campaign. Works pretty good, even when in your front shirt pocket.
Amazon link: here.
There’s a few pretty smart people here, you included, who know what could be store for someone showing up for a police interview without a lawyer or a recording device.
Thank you for the link. I placed an order.