Tonight on Dateline, a stunning new ending and a deadly case of poison.

It didn't seem like it could be real.

Like, how would this happen to me?

People aren't waiting for facts to come out.

I'm innocent, and people want me to be guilty. Mary was a chiropractor, very social, very active.

Healthy people don't just drop dead.

Nobody, nobody could do anything.

Did somebody deliberately give this to Mary?

Did somebody poison Mary?

So many things start jelling to make us suspicious.

The poison is found in Adam Yoder's Jeep.

They'd asked me flat out, do you think Adam could have killed his mother?

You always look at the husband.

They had found Bill to be with another woman.

They were sure my father had done this.

They're interrogating her for murder.

If you could have seen what they put that girl through.

Why would she want Mary dead?

No explanation.

She had a great relationship with Mary.

Maybe this isn't the slam dunk case that some people think it is.

Who killed the chiropractor?

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