When Lucifer (Tom Ellis) leaves the church near the end of the episode, he has blood stains on the front of his shirt near the shoulders and also on the bottom and the sleeves. When he walks out to his balcony, the blood on the bottom side of the shirt and the sleeves is there, but the stains on the upper part of the shirt are gone.
Chloe orders 2 ambulances "code 4". Code 4 means no further assistance needed. She should have said "code 3" which means "lights and sirens".