Suicide Hill (The Lloyd Hopkins Trilogy‪)‬

In disgrace after a badly handled arrest in New Orleans, Sergeant Lloyd Hopkins is assigned as a liaison officer to an FBI investigation into a series of diabolical and clever bank robberies. Three men have done their homework: they choose bank managers who are having affairs, kidnap their girlfriends, and force the managers to open the banks early. When the bank robbers turn violent, Hopkins finds himself with a bit of information he would rather not have—information about police corruption that reaches into the office of his sworn enemy Fred Gaffney, head of the Internal Affairs Division.