The first thing when you open the door, you'll see John Parkinson's body with a gun next to his right arm, you look at the living room seeing 3 chairs with 3 dead people sitting in it, one of them is the big brother William Parkinson and the little sisters Lily Parkinson and Sophia Parkinson. You see a gun just next to William Parkinson's chair. And in the kitchen, you see Amelia Parkinson's dead body lying on the ground with some broken plates.
two options:
check the guns.
check the bullet wounds.