Tested the brain tissue for cocaine and its metabolites.
The portion of the sample is mixed and ground with water. She creates control/negative samples, too.
All of the samples are tested. They used liquid chromatographic mass spectrometer I think she said?
It's very technical, and she's making it as simple as she can, but it's still technical. She knows it and Dean knows it, and he lightly jokes about it. There's a small ripple of laughter about it.
Cross
Hilliard asking about the difference between negative and not detected.
The sample was tested for cocaine, meth, fentanyl, Oxycodone. Not detected.
Hilliard asking how the spectrometer works. He's playing dumber than he is in my opinion, because he's asking precise questions about how it exactly detects different chemicals.
Asking what exactly detected, not detected, inconclusive etc means by the standards of the testing.