Runaway Heart by Stephen J. Cannell
Behind the impenetrable walls of a black-op government laboratory, a top-secret weapon is being developed - a genetically engineered animal with superhuman strength and speed. It thinks. It obeys. It kills without conscience. Lost-cause attorney Herman Strockmire and his daughter Susan are passionate advocates against corporate Goliaths. When one of their employees is literally torn limb from limb by one of the government's experimental prototypes, Herman knows he is onto something big. Hired to dig deeper into the employee's death, jaded Pl Jack Wirta is a man with little left to lose. Armed with nothing more than determination, Herman, Susan, and Jack plunge headlong into harm's way, stumbling upon a nightmare beyond all imagining.