This is the case of a middle aged man who died in an automobile accident. He has a history of taking methylene blue as a dietary supplement. At autopsy, he had a greenish-hued brain.
For those who aren’t used to looking at fresh brains, it’s usually a whitish yelow. Methylene blue is becoming increasingly popular as a possible nootropic agent, popularized by Joe Rogan among others. We might be seeing more of this.