GRANT, Mich. — Authorities searching for two women and a 9-year-old boy missing on the Muskegon River have found two inflatable tubes believed to belong to the trio, along with footprints in the area. Local News 3 missing after Muskegon River tubing trip, including 9-year-old boy Josh BerryThe missing are Jazzmin Hock, 28, and Sarah Vida, 28, both of Muskegon, and 9-year-old Kayden Kovalcik. The three have been missing since Tuesday. Investigators are evaluating the footprints found near the search area. Police are asking the public to stay away from the search area.