COLUMBUS, Ohio (AP) — Marcus L. Martin felt instant trepidation Sunday when he saw five adults wading thigh- and waist-deep in the Scioto River. A frequent boater on the Ohio waterway, the Baptist pastor knew the area where they were standing to be treacherous. He believes the people he captured in a photo to be the ill-fated group that drowned that day.

“I just remember being taught that area was kind of dangerous, in the sense of there being steep slopes” and a quick drop-off into the river, he told The Associated Press. A few years earlier, Martin had warned a pair of young people playing in the water at that same spot to “be very careful.”