After confirming the aquatic environment created by the zoo wasn't the cause of the deaths the vet says a toxin, is the most likely culprit at this point, which could have been added by a patron on purpose.

It's no surprise then, the zoo called police to investigate, but hold on, despite this and what their own vet says, a top official from the zoo speaking from the police station, says the deaths aren't suspicious at this time.

So the police will investigate, but with the zoo contradicting its own vets, this inquiry into the deaths of now forty rays is getting about as clear as mud.

Whether or not that does indeed turn out to be the case, we will find out in 6 to 8 weeks when the toxicology reports are due back.

For the details on the this continuing mystery, check this video clip.