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Parker, engineering your success. One chance in 342 million. The law professor kept staring at the number, gaping, in shock. There had been a string of deaths at two local hospitals and

according to his calculations they were almost certainly murders. The

suspect was a 40-year-old nurse named Lucia de Burke. She was tall and

blonde and worked shifts part-time at a children's hospital. There she had been on hand for several unexplained deaths. The staff

quickly grew suspicious. Still, the staff knew that everything might just be due to chance.

Perhaps De Burke was just unlucky in being around when the children died.

That's where the law professor came in.

He had an undergraduate degree in statistics, so he started running numbers. The results

were damning. According to his figures, there was just one chance in 342 million that De Burke was a victim of bad luck.

Put another way, it meant with near certainty that she was a serial killer, the worst serial

killer in Holland's history.

And the professor was determined that his math would bring her to justice.

From the Science History Institute, this is Sam Keene and the Disappearing Spoon, a topsy-turvy

sciency history podcast, where footnotes become the real story.

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