Lester Holt

I mean, blocking her calls, that doesn't necessarily mean that it's just over.

She can just find someone else.

If James was waiting for the Pekin police to take immediate action, he was in for a disappointment.

He did have Kate on his side, and together they wondered if Allison's own words might get investigators' attention.

So James developed a plan.

Use an app on his cell phone to secretly record his conversations with her.

I have to work in about 30 minutes, so I'll call you in a few.

Once James hit record, it wasn't long before Allison was offering detailed scenarios about how to kill her husband, Patrick.

Because it takes a while for it to react, so he would have time to get help.

So instead, she suggested luring Patrick to a remote location where a hitman would be waiting.

I have to position him in a place where there's nobody at all.

But something happens.

And the shot would have to be this right.

Once again, Allison asked James to find a killer.

On these recordings, she's very calm and collected and matter-of-fact.

Like, she's having a conversation about where you should go eat lunch.

I don't know what it's going to cost.

Allison seemed to be thinking of all the angles.

She suggested they start to withdraw cash in small increments to pay a hitman, a strategy to avoid suspicion.

She talks on these recordings that you have about how important it is that it not trace back.