Mrs. Bixby

Mrs. Bixby is a unseen character like Pat in Llamas with Hats.

Llamas with Hats
She was mentioned that she was trying to pull out weeds in her garden but Carl also killed her when he was helping her there.

Death
When Carl was helping Mrs. Bixby with her garden, he buried her alive because she wasn't keeping up with the weeding and claims that it was what she wanted.
 * Killed by:
 * Carl (intentionally caused, direct)
 * Asphyxiation (caused)