A surprise son and a deadly secret... The heart-stopping conclusion to Callahan Confidential It's a shock to private investigator Mike Callahan to see Shayla O'Hare again, and with a child in tow-especially with shots flying her way. Protecting the pair must take priority over their tangled past. Is she being targeted for her family's crimes-including possibly killing Mike's father? And what will Mike do when he realizes her son...is actually his son, too?