Here’s the break down:
First, their father died from multiple gunshots.
Then Rob was shot in the head.
Then I was stabbed.
His mother committed suicide and killed herself with a gunshot to the head.
Michael died later on.
Their dad= 9 bullets
Their mom= 1 bullet
Robert= 1 bullet
Michael= 3 bullets
total of 14 bullets
7+7=14 bullets
7x2=14 bullets
Kicking through the windows, kicking through the door