The Meter Maid Murders — Andrew Delaplaine

In this comic thriller about a serial killer loose on South Beach murdering meter maids and starring Jake Bricker, the most ineffective detective ever, the first meter maid murder was thought to be an accident. The second one, a coincidence. But when a third meter maid is killed, Chief Raffy Ramirez knows he has a serial killer on his hands.
And when that meter maid, Samantha Succubus, turns out to be the sister of Sara Succubus, the lead anchor of the XYZ Network's top-rated morning news program in New York, the story becomes an international sensation.
Stuck in a difficult re-election campaign, Miami Beach Mayor Johnny Germane leans on Chief Ramirez to solve the murders, and now! But Ramirez has every man on the Force working the case, except Jake Bricker, a cop Ramirez has labelled “The Ineffective Detective.” Finally, giving in to pressure, Ramirez puts Bricker on the case. “What harm can he do?”
When Bricker tells his high school buddy, Billy Willoughby, that he's on the case, Billy is overjoyed. In fact, Billy (chief investigative reporter for the local XYZ affiliate, Channel 69, WHY-TV) has just developed a lead himself and he shares it with Jake.