sentences:  They kill three couples until they try the big one in the house of a senator, Campion, whose son has recently disappeared.Campion reacts, though, and kills Hawk.Pidge flees but after some search led by Boxer and her team, they find a lead in the college they attended together with the kids of the victims; they were some sort of geniuses who wanted to try the perfect murder without being caught and for no reason, being inspired by similar gory stories collected in a novel, *The 7th Heaven*, full of latin quotations they actually left behind them in the murder scenes.