The Bricklayer by Noah Boyd

The Bricklayer is the riveting debut novel introducing Steve Vail, an ex-FBI agent who's been fired for insubordination and is content to spend his time as a mason, laying bricks, in Chicago. He's lured back to the Bureau to work a case that has become more unsolvable-and more deadly-by the hour. He agrees with stipulations, one of which is they agree not to pay him. This man has his principles, and the arrangement allows him to use some of his innate senses that got him in trouble when he was a working agent.

Noah Boyd is the pseudonym of a former FBI agent who currently works on cold cases when he's not writing. He was a highly successful FBI agent with over 20 years experience hunting some of the country's most prolific serial killers. His intimate knowledge of the Bureau's inner workings, including its weaknesses, and his "in the trenches" experience lends unusual authenticity to Steve Vail's character and the novel’s investigative details.

I'm just hoping this will be the first in a series. I really love the story.