Don't let it get you down, those things happen we don't want that to happen but it does. Nobody can say for sure if that deer is down or not, Deer are extremely Durable animals even though it's been hit it may have been a muscle/fatty tissue shot which means the deer may not expire at all.
Many Deer are harvested during rifle and muzzleloader seasons and during processing broadheads are found inside of them.
The one you hit may or may not be down but you'll have to wait till morning to go look and find out. Good Luck to you
Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the outcome of the vote.