How would you handle this?

My neighbor told me the other day that a stray cat had gotten into her garage and had kittens behind her washing machine. They couldn't get the kittens out, so her husband blocked off the garage to keep the mother from getting in there. He apparently thought that if the cat had easy access, she'd have kittens in the garage again.

Anyway, the neighbor emailed a bunch of people to see if anyone wanted the kittens. When she hadn't had a response after two days, I have reason to suspect that the husband took the kittens and threw them off a cliff into the ocean.

I obviously can't prove it, but I feel sick every time I see these people. If I could prove it, I'd report them. As it is, I teach their little son in church every week. I see them all the time at functions. I hesitated to say anything, and there were certainly repercussions when I did, but I couldn't have lived with myself. That was too messed up.

So how would you handle it?