Sarah Koenig

The caller must have had an accent of some kind because Massey's report describes him as an Asian male, 18 to 21 years old.

though it's unclear whether Asian in this case means East Asian like Korean or South Asian like Pakistani.

But anyway, a mystery caller says, look at the ex-boyfriend.

The caller hangs up.

Then, a few minutes later, the same guy calls back and says, oh yeah, by the way.

This time, the caller mentions a friend of Adnan's, Basr Ali.

Actually, the name of this friend is Yasir Ali.

The caller says, Yasir might know something.

Hangs up again.

The cops can't trace the call.

It's out of range.

Three days after the anonymous call, the detectives go meet with Yasir Ali at a pizza hut.

Yasir says, I didn't make that call.

I don't know anything.

Their notes from that conversation say, quote, If Adnan wanted to get rid of the car, where would he do so?

Ali indicated somewhere in the woods, possibly in Centennial Lake or the Inner Harbor, unquote.

No one has ever gotten to the bottom of who made this anonymous call.

The cops didn't figure it out.

Anand's attorney didn't figure it out.

I've tried to figure it out, too.