Ian i think coz ians boy toy saw him kill peter thats why he was traumatized
pretty sure it was victor. van showed up to make sure he was dead n to control the narrative (that it was just a random gray as opposed to the health center director from another district.) ian only saw van standing over the body. the whole reason ian gave van a chance is because he found out it wasn’t actually him who killed peter n bc he doesn’t think negatively of grays like he thought (bc he overheard van talking on the phone. which again, was just to create a rumor that it was a gray that was killed.)
Yall can someone remind me if it waa Victor that killed peter or Ian? It's been so long and my brain is hazy