[JanH]

Good advice here. If you don't want to take the little guy with you to talk to the neighbor, you could take a picture of his black eye. We had a next door neighbor family once that had an older brother about that age that played with knives. Like throwing them at trees and stuff. We ended up limiting our kids' playing time with that bunch. With closer supervision by us. And no time could they play with them when older brother was involved.