I have the same problem. I was losing hens, but couldn't figure out where they were going. My neighbours huskey has the run of our cominuity.He is a pest to everyone, into garbage etc.
One day during dinner my husband caught site of the tail going around our house. Seconds later, he had my favourite brown hen, Juanita, & was running towards the woods.
I called the police, they visited the owners. I'm the one at fault, in husky's owner's eyes. This has always been a problem with this family, & noone challenges them. I had to make the second call.
I lost 5 hens & my hubbie didn't want to press charges. I salute you for being brave. I will not back down if I see him on the loose again.
Good Luck