Bad Faith by Nick Stevens

Former deputy U.S. marshal Mason Ashford has it easy running security at Gridlock, the largest nightclub in Washington D.C.
When a federal judge’s daughter goes missing, an old friend reaches out to Mason with a desperate plea: find the girl, wherever the path leads.

Paired up with a suspended cop with her own demons, Mason’s investigation uncovers a violent world of gangs, human trafficking, and drug-fueled cults. When another missing girl with ties to Mason turns up dead, and more bodies are discovered, he finds himself on the run from the police.

With few leads and a cold trail, Mason’s only choice is to find the judge’s missing daughter before her time runs out.