And then you made it look like you were saving her by diving in first.
You quickly cut the hidden gut with a small pair of scissors,
got her out of the plastic bag, and made it sink to the bottom of the pool.
The ghost story you spread about the "evil spirit" is a bunch of bull, too.
As for the hair that was all over you when you got out of the pool,
I bet you'd gathered it up while cleaning.
Afterwards, you knew it'd be all over for you if someone found the plastic bag,
so you used the hair as a prop,