They are involved because of the seriousness of someone portraying a police officer (or God forbid being an officer) while they commit the likely pre-meditated homicide. The portrayal of a peace officer takes this criminal act to a WHOLE DIFFERENT LEVEL. The likely pre-meditation and planning takes this to a more serious level too. The perp likely left very little if any hard evidence at the scene and you can't catch a criminal without evidence. In addition to all this, this case has been thrust into the national (and international) spotlight so it has become not just a local priority but a national priority to solve. Midlothian police are wise enough to call on the BIG GUNS/ BIG GUYS and they are wise enough to have responded and assist. Just think of how wise the Boulder, CO police department would have been to do the same for poor Jon Benet Ramsey. That case still breaks my heart.