A family is grieving after a Lake Orion man died south of Au Train Island Sunday afternoon. Police say the investigation is ongoing, but according to the victim’s brother, the man was on a boating trip to scatter their father’s ashes in Lake Superior.

Fifty-nine-year-old Robert Louis of Lake Orion, Michigan, died shortly after he and six other passengers fell out of their 19-foot wooden kit boat near Au Train. The group had been honoring the final wishes of Louis’s father, who died two weeks earlier after years of battling Alzheimer’s.

John “Joe” Louis said his brother had devoted his life to caring for their father during the last four years, and that two weeks after their father’s death they divided the ashes, placing half on their mother’s grave and the other half in Lake Superior.

Michigan State Police were dispatched to a boating accident Sunday around 6:00 p.m. When troopers arrived, they found six boaters rescued by a nearby pontoon boat and being treated for hypothermia; the seventh passenger was not recovered immediately. A witness on shore told police he saw the boat take a sharp turn for reasons unknown, spilling everyone into the lake. Police say the throttle was still open when everyone fell out. MUNISING, MI — Police have identified the body of a Michigan man found in Lake Superior after a large wave washed seven people off a kit-made wooden boat during a weekend accident. The victim was Robert Louis, 59, of Lake Orion, Michigan State Police said Tuesday. The rescue and recovery effort took place near Pictured Rocks National Lakeshore.

"What I gathered from the information was he tried to grab the boat as it was circling around him and the prop hit him, and I'm not sure if it made it so he couldn't swim or if it injured him bad enough to be life threatening," Alger County Sheriff's Department Officer A.J. Schirschmidt said. The Alger County Sheriff's Department and the U.S. Coast Guard searched the area for about 24 hours before the body was found. "We searched for quite a while above water when the helicopter was around," Schirschmidt said. "The Coast Guard got some better information of kind of where they figured the accident occurred so at that time we put two divers in the water."

Robert Louis' body was found by the Alger County Sheriff's Department Monday afternoon around 3:00 p.m. south of AuTrain Island. "Just everybody he met was his friend, he was very helpful, kind," Joe Louis said. "The kind of guy that would run into a building on fire to help the people — incredible."

If you would like to donate to the Bobby Louis Memorial, please visit the GoFundMe page. Watch TV6 and FOX UP for the latest information. Police initially said all those swept overboard in Sunday's accident near AuTrain Island had been on a pontoon boat. On Tuesday, police corrected that information, saying they were aboard a 19-foot wooden boat that had been constructed from a kit. The boat's owner, Tim Preston of Marquette, was on board along with Louis and five others near the island's south side when a large wave hit the boat, pushing everyone overboard. Louis attempted to swim back to the boat but drowned, police said. Authorities searched on Sunday and Monday before the Alger County dive team recovered his body Monday afternoon near the accident site. The other six passengers were rescued Sunday by a group on a pontoon boat that had been in the area and were treated for hypothermia.