Some of them I can’t make out but the green one is readable if you read the left side first (it’s in two columns).

It starts off saying the police think she did it but that’s slander and discrimination, but then turns into admitting she did it and a lot about how she’s a bad person and doesn’t deserve her parents and will never have a family of her own.

Closest she comes to a motive in it is “I killed them on purpose because I’m not good enough to care for them, I am a horrible evil person.”