When you were there for Derek's first kill

You walked up to Derek,carefully since he was upset. You say in front of him. He kept his eyes close,never opened them
"Derek,it's okay. Open your eyes. You did nothing wrong."

He shook his head,eyes closed
"No,(Y/N), I did something horrible. She is dead because of me."

You looked at him
"Who?"

He kept his head down,allowing you to see the body
"Oh,Derek."

You hugged Derek,your best friend.