Rookie

My neighbor has, well had, this little white dog (bichon frieze) that was always getting out and coming over to my house and chasing my wifes cat around. The thing was a pain in the ass and could run like hell. Sometimes it would take me 20 minutes to catch that damned dog. I comlpained every time to the dogs owner (single Mom with 3 kids) and she'd just kind of do a "golly gee" shuffle, take the dog and shut the door. She did mention once that the kids loved the dog more than anything in the world. One time, the mutt came over and was chasing the cat again. I had to leave something in the garage to go try to catch the dog and take it back home. I caught the dog, and took it back next door, but they weren't home. I used a little piece of twine that I hooked to the collar and tied to the post on the front porch of their house. I gave it a bowl of water and left. I went back home and remembred I had to meet my wife to make arrangements for her parent's 25th wedding anniversary. I cleaned up and jumped in the car. I have one of those long driveways that clear to the back of the house so I have to back slowly to make a bend in the driveway. Just as I went around the little bend there was a yelping/howling noise that would wake the dead. I jumped out of he car and it was the damned dog flopping around on the ground like a fish. It somehow got loose and came back over. To make a long story short, the damned dog died and I buried it in my back yard. The kids are putting up posters all over the neighborhood and still crying about it 5 days later. I disnt want to tell them because they know I hated the dog and I just know they'd think I killed it on purpose. Frankly, I hated the fucking thing and I'm glad it's dead, but should I tell the family what really happened?