[bloodmeridian]

were they going to poison the whole city trying to kill the Pope maybe??

They need a hell of a lot of cyanide to do this, an amount far greater than anyone would be able to carry.

[Rebelbase]

I worked with guy who ran a gold mill somewhere in Mexico back in the 60's. He used a cyanide solution to separate the gold from the ore.

There was a leak in the separator that caused the some of the solution to run into a small creek nearby, it went unchecked for a several days.

The leak was discovered when the odor of rotting animals brought to his attention all the dead birds, rabbits, coyotes, etc. littering the creek bank.