The Evening Wolves. Iron on Iron, #4

Every victory comes at a cost. The trail has gone cold. For months now, Emery Hazard and John-Henry Somerset have been trying to find something-anything-that might help them uncover the truth about the criminal organization operating out of the Cottonmouth Club. But every lead has turned out to be a dead end, and every step forward has cost them two steps back. Until, one night, John-Henry is arrested for a terrible crime. As their friends gather again in Wahredua, Emery and John-Henry must rush to prove John-Henry's innocence.
The falsified evidence used to implicate him provides them with fresh clues, but as the charges against John-Henry ripple out into the community, they find themselves without their usual resources, and facing new and unexpected opposition. Putting an end to this evil, they discover, might be possible.  All it will cost them is everything.