They say they won't stop protesting until they're heard.
National MP Matt Doocey called the note "disappointing".
He was 69 years old.
He has continued name suppression.
Four crews were called to the blaze on Monday night.
She was working a night shift when she was attacked.
They said months of not knowing if they would ever have answers had taken its toll.
The explosion happened last July, injuring several people and destroying a house.
A woman has raised thousands of dollars to buy the teddies.