Complex sentence: Ryder talks to J.J. 's sister Nancy (Kateri Walker) who says that J.J. drowned in a river, but J.J.'s teenage son Junior (John D. Montoya) doesn't believe that.
Split into simpler sentences: Ryder talks to J.J. 's sister Nancy (Kateri Walker). Nancy says that it's believed that J.J. drowned in a river, but J.J. 's teenage son Junior (John D. Montoya) doesn't believe that.