Crime scene?

Crime scene?

Observation - Crime scene?. Description: Any ideas what has happened here? It looks like a beetle carapace but there are no legs, just some sort of amorphous matter underneath. Could this be the excreta of something that eats beetles? About 4mm long.

Any ideas what has happened here? It looks like a beetle carapace but there are no legs, just some sort of amorphous matter underneath. Could this be the excreta of something that eats beetles? About 4mm long.