John Watson - Irene Adler
Irene considered her response carefully. "Murder, not necessarily, but it could have been an accident." She sat down. "Kidney failure doesn't affect the lungs. I found weird crystals in one lung, and I sent it for testing, but it could be anything from an indication of drug use, to something like calcium oxalate." Calcium oxalate was one of the primary ingredients in ethylene glycol, or antifreeze. "I thought if I could get a hold of Dr. Brinkman, he could tell me about any other symptoms that might suggest poisoning. Whether it was accidental or on purpose."