The Hidden Man by David Ellis
On a hot summer night in 1980, two-year-old Audrey Culter was snatched from her bedroom and never seen again. 26 years later, her brother, Sammy, fatefully crosses paths with the man the police failed to convict for her abduction and murder. A few weeks later, that man is dead, murdered. Private attorney Jason Kolarich is engaged to defend Audrey's brother. But can he trust the people who hired him? Why are they paying for Sammy's defense and why do they want the case heard so quickly? Why, when Kolarich's investigations lead the police to a buried cache of children's bodies, do they kidnap his brother and threaten his life? And finally, what is Kolarich's own connection to the case?