I know Ellis Island is a major immigration station in New York... Is there a specific time period though?
it is b) hammurabis code because of the year
One assumes you are talking about the unfortunate Daisy Armstrong, daughter of Colonel Armstrong. If this is the case, there is no official explanation but the assumption is Ratchett/Cassetti (the murderer) killed Daisy because he could not be bothered to take care of the young girl. After all, he assumed he'd get the ransom money anyways.
Explanation:
The slavery Has been around the 1600s