Lori Daniels Mystery: Lover Come Back by Tom Preschutti

Police Sergeant Lori Daniels leads a team of detectives that uncover a plot by a corrupt city official, who uses murder and intimidation, to try to take control of both city hall and the largest crime gang in the city. Witnesses are refusing to talk and the body count is rising, while the team methodically zeros in on the diabolical mastermind.