After the events of the Season 1 Finale and Lucifer bleeding out Chloe tells Lucifer in S2x01 that she has samples of his blood.
Now obviously after hearing those news from Lucifer himself Amenadiel tries and succeeds in convincing Chloe that Lucifer's near death experience was just an act of his because of his broken psyche when growing up, using evidence of a bullet proof vest and blood capsules.
By the end of the episode Chloe throws away the blood sample, making it that no celestial blood ends up in the Police Database.
Now...how about if Chloe still went through with it? Would that shock the world to its core, cause and uprise in confusion in the scientific community, make Chloe discover the truth or just have nothing happen?