Ah, I was wondering where the other pieces might've been. They turned this into quite the morbid scavenger hunt, didn't they?

[...so that's a yes from Will. But he'll elaborate.]

I found a few more as I made my way toward the pond. An arm in a clump of bushes and her waist with the legs still attached on a planter not far from that. The method of their remove matches what you found on your parts: something with serrated edges was used on them.