Predator: Dark River (1996) #1

Schaefer joined NYPD to "serve and protect." It's a bug in his blood or a chip in his brain. But as bad as things get in the drug-infested concrete jungle there's something worse out there, something that really needs stopping. The last time Schaefer faced it down was three years ago, in Russia. Now he's got another chance to stop that evil. He's heading down to the jungles of South America, and he'll come back with the head of a Predator . . . or he won't come back at all.