If it's dead, why does it matter? Is there some dead-animal handling protip I'm missing?

Last time I encountered something like this was years ago when we found a non-moving possum in the middle of the road. Can't say for sure if we ran into it ourselves.

Mum ended up taking it to the ambulance station near our house because she didn't know what else to do with it (she wanted to do something about it).

We didn't hear back about it since. I'm pretty sure it died from internal bleeding.