They are, at the same time, frightening and fascinating, so bizarre that we struggle to find a rationalizing element to bring them into clear focus.
There is none. A man like the Kensington Strangler or Stranglers who murdered Elaine Goldberg on Ruth Street near Hart Lane in early November or who killed Nicole Piacentini less than two weeks later on Cumberland Street near Jasper may be behind you in the checkout line, seated next to you on the bus or unlike anyone you ever met.
Composite photos, even the detailed descriptions from victims who survived their encounter with what looks to be a single suspect, tell us only that he looks like a lot of men we pass on the street.
He may already be a serial killer, if it turns out that Allison Edwards, whose body was found on Glendale Street near Erie Avenue in Juniata Park on Friday, met her death at his hands. Three surviving sexual-assault victims in the same general area may have been targeted by this depraved strangler.
A serial killer is one who commits at least three murders with a cooling-off period. The FBI defines serial killings as "involving an offender associated with the killings of at least four victims over a period greater than 72 hours."
Police have not yet attributed Edwards' murder to the same man. But her mother told the Daily News that Edwards knew one of the victims.
"It could be that [Edwards] knew the killer, too," Karen Emery said of her daughter.
Even if Edwards' killer was someone else, there is a man on our streets who has killed without remorse and will likely kill again.
We ascribe superpowers to people who get away with murder again and again. To hear us tell it, Ted Bundy was an evil genius who led a corps of supersleuths and profilers on a fruitless chase.
But he was nabbed by a uniformed cop who pulled him over for speeding. This "genius" was caught with a rape kit in the trunk of his orange Volkswagen.