Serial killers are capable of disguising themselves as normal citizens in society. Their chameleonlike demeanors help them to hold down jobs, play at having happy families, and manage their social lives—all without allowing their masks to slip. At least for a while.
For the majority of them, it’s only a matter of time before they make a mistake and are caught. At that point, the families of these serial killers are informed and they find out exactly with whom they have been sharing their lives all this time.