I don't know why, but this reminded me somewhat of Miami Vice. Everyone is a player. Except for one young woman, a rape victim. Everyone else not playing is excusing the player's behavior, twisted as it is, because the players also do some good, as if it made it all balance out. As if. Reading these books in the Delaware series gives the reader real insight, if you have the experience of knowing a lot of people, and if you want to really understand what makes people tick. From my own experience, though, nice people usually want to think the best of others, not the worst. However, I find the story of the scorpion that needed a ride on a human's shoulder over a shallow stream instructive. The nice human asked if the scorpion would sting him if he helped him cross the stream. The human was kind, wanting to help the poor animal, but was leery enough to worry about being poisoned by the scorpion's tail. The scorpion promised, so the human carried it across the shallow stream. As soon as the crossing was done, the scorpion stings the human. As the human falls, dying, he cries, "you promised!" The scorpion shrugs, saying, "you knew I was a scorpion."
Admittedly, humans dealing with humans is more complicated, and so is this story. While you can look at a real scorpion and identify it, in the world of cops, criminals and psychologists, it isn't so easy to identify the scorpion-minded among us. Bad behavior is a big clue, as well as selfishness and unusual cruelty. Nice people often discount such scenes, or disbelieve their own senses, and cover up for the scorpion people. Other folks admire the scorpions, and help them, thinking being near the 'power' will spill over by the proximity, blinding themselves to the fact they are close to a scorpion person. Delaware and Milo never do, but unraveling disguises to reveal the scorpions is a lot of leg work, particularly in this story.
Respectable scorpions are still scorpions, even when the human ones hide their stings in gifts of education and money and sympathy. The problem with 'The Clinic' is almost everybody is a scorpion. I could not care about any of them, even the nicer victims, because they were still scorpions. I'm talking about their dark sides, not their childhoods. They chose scorpion adulthoods after surviving evil, and I can't care about scorpions, no matter how much I 'understand' them.