Cops so dumb, they need a journalist to help solve it
All of a sudden, you have this thug who has a off-the-charts IQ with a ridiculous motive, who is able to cleverly plan revenge murders to keep the cops guessing. He shows up at EVERY murder that he commits at 24-hr increments, the detectives see him EVERY TIME, and they still can't seem to catch him. They're so incompetent that it takes a journalist who travels with them, and walks freely among crime scenes, to help solve it.
Poorly written, scripted, and directed.
Even Pacino, whom I wonder why he did this, can't save it.