Chocolate Brown postmoem staining is seen in -
In poisoning by nitrites, potassium chlorate, nitrobenzene, potassium bicarbonate and aniline the colour of postmoem hypostasis is chocolate brown due to methhemoglobinemia. Dr.Narayana Reddys Synopsis of Forensic Medicine and Toxicology 27th edition pg. 76.
KCI Poisoning
Opium Poisoning
H S Poisoning
Cyanide poisoning
Death and postmortem changes