Can you imagine? A criminal investigation where the ‘cops’ could never talk the perp?

Yup, that’s how it works when the perp is a guilty, lawyered up, Repub criminal.
Dotard’s high priced legal team, who did mock interviews and decided, ‘no way he can testify, cuz he’s such a LIAR, he’ll incriminate himself’. Look it up if you doubt. That’s what his lawyers said, SOOOO, Dotard never had to testify, (that’s what Big $$$ gets a Big Criminal), and now we get Mueller’s report, after he could NEVER interview the guilty bastard.
Let’s see what happens, BUT, wouldn’t we love to hear what the guilty bastard had to say?
AND, let’s say you are a guilty criminal, wouldn’t you LOVE to never have to talk to the cops?
That’s how it works in Pub world.
Some things never change.....