This is really alarming, on so many levels. The most horrid of which is the terror and probable pain these poor ducks went through and may still be going through. If these few came back without wings, what on earth may have happened to the others?
(how many went missing and how much time has passed?)
Whoever did this must be found if at all possible. Where is an animal loving private investigator when you need one?!!!
The lower life forms that did this might be back and I'd be ready. Do you have any one who would be willing to set up some kind of hidden webcam?
The law enforcement folks - doesn't surprise me but certainly disappoints. The trespass angle that was mentioned is a good one - that they do understand.
Aughhh - if I ever caught anybody harming any defenseless innocent little being, I am pretty sure I'd go postal on them, without any hesitation whatsoever.
They must be stopped.
The ducks that came back - do they need med care? Pain killers? Poor things - can ducks without wings even balance in water?
Tough call on what to do here - you have to decide whether to keep quiet in the hopes the evil doers come back so you can catch them (and do whatever you want with them as far as I'm concerned!) OR whether you raise hell publicly in the papers etc. in case this both raises awareness and attention and also wards off a return visit.
I hope that they are somehow caught and prevented from exacting torture on any other living being and that you have no other losses, and that somehow, miraculously, you can find your other missing ducks. Which brings me to wondering, do you think the intruders got to your place on foot or would they have had to drive? If on foot, is it possible to comb the surrounding area to see what you can find?.
JJ