RE: coyotes killing deer
Here is the answer you are looking for.
No matter what hunting camp you go to, you will always find someone that knows someone that said that someone seen this or that.
The truth is - if you knew where the coyote den was at - why didn't you set up there and kill the mother and kill the father and kill the pups and then you wouldn't have all of these problems.
This same story has been all through Pennsylvania and Ohio and the other states. Is it true? Probably, did your friend see it in your backyard - probably not. Coyotes are a very private animal and do not like human intervention.
They will visit your area very late at night and probably doesn't go out of the den very much during the day time.