BEASTMAKER by James V. Smith.

FIRST. NY: Dell, First Edition. 4 1/2 x 7 1/2. Paperback. Fine / Fine. ISBN:  0440200423. Project Michigan: a top-secret government experiment in genetic mutation has gone monstrously wrong. Leaving a bloody trail thru a Texas countryside that left only one witness. A witness who is now trying to clear himself of the murders, and not becoming the next prey.