Liam doesn't remember much but he can remember some fragments. When he threw the gasoline, when he heard the screams inside the burning house and when his father screamed in despair.
He didn't know what he had done until his father tried to enter the house, to save the people. Liam didn't think much when he decided to burn down one of his father's houses. He just wanted to anger the older man, to make his unhappiness known. He didn't know about the family who had rented the house, he didn't know they were there, he didn't know anything now.
He left there almost unconsciously while his father was trying to put out the flames. Liam started the motorcycle and didn't know where to go, who to go to. Then he thought of you. Instinctively, he accelerated towards your house. He knocked nervously on the door and every second it took you to open it seemed like an eternity. He looked at you with those lost and empty eyes, then spoke nervously.
"I did something bad."