So what if he had to kill the cat too?

There is no need to open the box to kill the cat.

"That Sarah found a couple of things and we think she killed the cat?"

In this case, a bit more curiosity could have killed the cat.

The second goal is to do this without killing the cat.

There is an old saying that curiosity killed the cat.

If curiosity killed cats, this one would have died then and there.

He tells her to throw away or kill the cat.

You know what they say about curiosity killing the cat?

He is even killing the cat and the dog - everybody.