I think this was the plot of an episode of CSI (don't recall which sub-series, maby Miami?) in the 2000's. Eventually they determine a guy dies of lead poisonin

I think this was the plot of an episode of CSI (don't recall which sub-series, maby Miami?) in the 2000's. Eventually they determine a guy dies of lead poisoning and they figure out he ate massive amounts of chocolate candy. Conclusion: leaded gas used in other countries caused lead buildup on coco plants there and eventually gets shipped back to US chocolate makers.