There's an interesting part in the prose novel version of Concrete Jungle, where Detective Schaefer, Dutch's younger brother, remembers the last time he met Dutch. During a conversation over drinks, the topic got onto hunting, and Dutch started talking about weapons future hunters might have, like energy guns and cloaking devices. Dutch was never seen or heard from by his brother again after that. Could it be that Dutch got in trouble with the government for saying too much about what he'd encountered back in 1987, perhaps they worried he might leak proof to the public of the Predator's existence, and decided to silence him permanently?
