Psycho-Fish

OK - you remember all of that stuff I wrote about the fish murders, and how it was attributable to a broken pump?

All wrong.  We were all deceived by one evil mother-bleepin'-striped fish.  He was apparently lying low until Veteran's Day.  [Give me enough time and I will have a theory on that].

There is currently only one fish in the fish tank.  Psycho-Stripy took out everyone else.  I think he meant for it to be a murder suicide - he has been swimming in circles like he is trying to bite himself.

It was him all along.  He killed Goldy, framed Goldy #2, somehow got to the fish tank guy (or maybe he disabled the pump just before the fish tank guy came), waited patiently, then killed EVERY OTHER FISH in the tank.

Only three problems with this master-fish-criminal's plan.  First - when you kill everyone else, everybody knows you are the killer.  Even if you haven't read an Agatha Christie book - it would make sense to leave one other fish alive. Plausible deniability.

Second - perhaps killing helped alleviate the crushing boredom of living in a fish tank.  Only now will Psycho-Stripy fully understand that fish companionship is the only thing that would have alleviated his ennui. 

Third - because of the earlier carnage, we installed a nanny cam that filmed the fish tank 24/7. 

Dude's been eating a bunch of sushi.

The good news for him is that his punishment is life without parole.  No one wants to try to remove him from the tank.  Crazy bleepin' fish.