It made George uncomfortable that Pia was being so short with this guy. As his family was blue-collar, George felt a kinship with people like maintenance workers.

Disappointed at not finding any contamination in the biosafety unit, Pia was beginning to feel a big letdown. Yet there was one other place she wanted to check: Rothman’s office. Besides the biosafety unit and the organ bath unit, that was the only other place where both Rothman and Yamamoto spent any time. The problem was Marsha and her guard-dog mentality. Even with Rothman gone, she suspected Marsha would be Marsha.

As Pia and George returned to the lab proper, Pia was running through her mind possible ways to handle Marsha. Luckily the problem solved itself. Marsha was no longer sitting at her desk. Pia guessed and hoped she’d taken a late lunch like Spaulding.

With Marsha no longer standing guard, Pia and George hustled into Rothman’s inner office. Inside, there had obviously been some packing going on because scattered around were open cardboard boxes half full of books and papers. Pia ran the probe around the desk, the shelving behind the desk, the couch, and the coffee table where Rothman’s guests, usually journalists, would sit and hope that they would be the one to breach Rothman’s famous guard. They were inevitably disappointed. Next they tried Rothman’s private bathroom, which his celebrity status had afforded him; no other lab had a bathroom like this. But the Geiger counter stayed mostly silent except for the background crackle, just like in the biosafety unit.

Pia almost forgot about it but there was one more room—not so much a room as a storage area, where Rothman used to keep supplies scientific and secretarial. The place was stacked with toilet paper and paper towels, cases of beakers and test tubes, reams of paper, and old files. And here also was Rothman’s beloved Nespresso machine. Well, maybe, thought Pia. Just maybe.

There were a few wayward clicks from the Geiger counter next to the coffee and cappuccino maker that made Pia’s pulse pick up speed. Next to the coffeemaker was a dish towel, folded in half and carefully spread out in a small space between the coffeemaker and the coffee fixings themselves. The towel was supporting four white porcelain coffee cups: two espresso size and two regular size. They were sitting upside down. There were a few more clicks as Pia ran the probe over the bottom of the two regular coffee cups. Then she held the counter in her left hand and turned the cups over. She put the probe into one cup, then another. There was definite activity. It wasn’t off the chart but there was more activity in the cups than in the rest of the lab.