Luminol says that the abortion mills' walls were bloodstained. What's your point? That happens in any slaughterhouse. This one happened to be where they slaughtered unborn children. No hyperbole there at all, just uncomfortable truth.
Looking into Luminol further (thank you Google) I find that simple household bleach can cause Luminol to glow just like it does with blood. If the clinic used bleach to clean the blood and gore from its premises (they were a slaughterhouse, don't forget) the Luminol may glow demonstrating the presence of blood and/or bleach.