The adult Masked Hunter is a striking, shiny, black bug about 3/4” long. The immature (nymph) has a sticky “finish” that attracts lint and dust; in short, stuff sticks to Junior, earning it the nickname “dustbug.” MHs are insect-feeders, untiring consumers of bedbugs, a pest that is staging a comeback in big cities everywhere thanks to the ease of world travel. If you have the predator, perhaps you should check for the prey.
That’s actually an exaggeration of what the article says. “Almost always” should probably just be “maybe”.