Who ate my gold fish's head off?

That gold fish grew up in that tank as a baby with all those other ones for about a year, then one day out of no where we seen his head bittin off!
What's your vote? You think the Jack Dempsey ate the gold fish, or the Koi did? We still are unsure and we need your opinion on the matter!
You can see more pics of my 180 gallon in-wall aquarium here:
www.yurtopic.com/home/interior...
Also, one side of this tank is in my bedroom movie theater, here:
www.yurtopic.com/home/interior...

[@wesleykeith6241]

it was the blue one. and the white fish is a koi

[@deeisme81]

big bubba did it?

[@Animebrity.]

damn!

[@Layzha]

Lol

[@amors266]

:( :( :(