Kelly Parker, an investment firm clerk, witnesses the murder of her boss and a good friend. A disk Kelly's employer gave her may contain evidence of a crime, and the assailants are determined to get it. She flees the scene, and Trent Tucker, former bounty hunter and investigator for the Colby Agency, must determine if she's running out of fear or guilt. In AGENT COWBOY (4), part of the Colby series, Debra Webb does a good job of plotting a substantial tale. Cole Dane is also introduced as a promising future lead.