Hoofprints

When California veterinarian Gail McCarthy arrives to treat a sick horse, she sees the rancher and his wife slain, and a man running away. She makes a report to the police, identifying the man as a local hobo and returns to her business. When later she is shot at while answering an emergency call, Gail realizes the murders are her business and she must find the couple's killer. By the author of Cutter.