The sixth man - David Baldacci

When alleged serial killer Edgar Roy is locked away in Cutter's Rock psychiatric unit, private investigators Sean King and Michelle Maxwell are called in by Roy's lawyer, Ted Bergin, to examine the case further. But the investigation is derailed before it begins when

Bergin is found murdered in his car on the highway.

A sinister trail of terrifying events begins to unfold as King and Maxwell attempt to determine Roy's guilt or innocence. When the FBI become involved, it fast becomes apparent that there's much more to this case than meets the eye. As they dig deeper into Roy's past and learn about his phenomenal ability, they are bombarded with obstacles, half-truths and dead-ends which make filtering the facts all the more difficult.

As each new theory brings a new revelation, King and Maxwell are pushed to the limit.

Could this be the case which leaves the duo permanently parted?