MUSKEGON TWP., Mich. — Three people who went missing on a tubing trip down the Muskegon River have been found alive and safe. Officers followed the tracks deeper into the wilderness until they located the missing tubers. Michigan State Police Lt. Pat Agema said the rescue came after days of searching the river for clues. The discovery of the footprints near the log jam proved to be the break searchers needed. "When they went back to this specific log jam, they actually got out and walked on the log jam and noticed some child footprints in the grass.