“Missing” is not a sequel to 2018’s “Searching,” but the pictures share a universe where detective work is carried out on computers, giving traditional sleuthing a screen update. The new film is a desktop thriller that attempts to build on what “Searching” started, changing up the central mystery while maintaining a heated look at clicking and calling as a young woman fights to learn more about her mother’s disappearance. Writer/directors Nick Johnson and Will Merrick (making their helming debut) stick close to the formula of the previous offering of static suspense, maintaining focus on the confusion of the situation and all the concentration it requires. “Missing” isn’t a real stunner in terms of summoning tension, falling a little short of its predecessor as it tries to provide a similar viewing experience, only with a slightly less interesting story. Read the rest at Blu-ray.com