Hannah Frey

It cannot be compelled.

It must be information and it must come from the mind.

If someone volunteered to be part of a P300 test on their recognition, then it could be allowed because they've consented to it.

And that's how it's happened so far in courts.

But you could just close your eyes and be like, I refuse to look.

About 20 years ago, there was a guy named Terry Harrington who had been convicted of a murder back in the 70s and had always...

always denied that he was part of it.

He always proclaimed his innocence.

When this technology for the P300 event-related potential came around, he reached out and said, do it to me because I wasn't even there.

I'd never even been there before where the murder happened.

And Lawrence Farwell went there.

and tested the guy's brain.

And sure enough, all the locations and information that only the murderer would have known didn't cause any recognition signal in the guy's brain.

Here's the problem, though.

They didn't bring it to court because all they did is they confronted the witness who had fingered him.

It was this guy, Hughes, who said, oh, yeah, Harrington did it.

They came to the guy and they said, you know, we just did this brain scan and like he passed.

He wasn't there that night.

And the guy went, oh, well, I can I recant because I actually lied.

Wow.