Genetic Bomb is a novel written by Andrew J. Offutt and D. Bruce Berry. It was first published in 1975.
Flash Casey should know better than to take a roll of film from a desperate man. Stopping for a drink on his way home from work, a fellow news photographer gives him a canister to safeguard. The next morning, Casey wakes up with gunmen in his bedroom, looking for the film that could implicate one of their associates in a killing. To save his friend's life, Casey hands over the negatives, expecting that to be the end of it. He's wrong.