Here's why:
* Cats don't scream: Cats vocalize with meows, purrs, hisses, growls, and chirps. They don't have the physical anatomy to scream like humans do.
* Screaming requires air: Screaming is a vocalization that requires air to be pushed through the vocal cords. A dead animal cannot breathe or move air.
* Death is silent: Death is a state of no biological function, including sound production.
While a cat might vocalize in distress, it's not a scream, and it's unlikely to continue after death.