“Have you ever seen anybody do anything like this before?” In The Frozen Ground, an Alaska State Trooper (Nicolas Cage) asks that question about a series of particularly brutal cold-case serial killings in which the lead suspect is an upstanding local citizen (John Cusack). The only real lead is Cindy (Vanessa Hudgens), a stripper who’s the one would-be victim to escape from the killer. Writer-director Scott Walker’s film, based on real events, co-stars Dean Norris, Olga Valentina, Michael McGrady, Radha Mitchell and Curtis “50 Cent” Jackson, who also is among its producers. Lionsgate opens the thriller August 23: