What is the narrator point of view in the novel, The Weight of Silence?

One of the interesting aspects of this book is that it is written from many points of view. This sections that highlight Antonia's point-of-view are written in the first person in present tense. The sections in Calli's point of view are written in the third-person omniscient in the past tense. Even though it is the third person, her sections also delve into her thought processes. The sections from Petra's point of view are written in the first-person present tense. When Martin gets his point of view, it's in the first-person present tense even though it frequently covers events that have already taken place. However, when Ben's point of view is given, it is in past tense and he talks directly to the missing Calli. The sections with Deputy Sheriff Louis' point of view are also written in the first-person present tense.