Demise of the turtle

This is an inside view of the shell top that is all that was left.
We've had our turtle outside in a bowl, where we regularly changed the water and fed him. He had a brick "cave" and wooden logs to climb on. Well on Wednesday night, something got to our turtle and all that is left is the shell. We don't know if it was a racoon or an owl or what, but something must have eaten him. All we have is the top part of the shell. Not a good thing.