[Proof of death by drowning by smoker cells washed into the left heart blood]

Post-mortem cytological examinations of left heart blood have established that in cigarette smokers drowning or aspiration of liquids cause smoker cells to be washed from the pulmonary alveoli into the heart blood. Cytochemical detection of smoker cells in the heart blood is recommended as a forensic test with regard to diagnosing the vitality of drowning.