Search teams combed through the tangled water foliage near the dam, hoping clues might turn up there, said Clarence's BCS classmate Shawn Boor, who has been with the family for a large part of the search.
Some rescue boats were equipped with sonar technology. Pulaski County Rescue searched areas of the lake as deep as 315 feet, an official said.
Rescuers also have scoured the steep and wooded terrain surrounding the lake with two search and rescue dogs. Family members were told to continue searching on the lake to avoid confusing the dogs by throwing them off the scent, Arnold said.
Officials have ruled out foul play because Clarence’s duffel bag with his belongings and hand-held radio were untouched. Clarence was wearing only his white swim trunks with blue flowers and a wristwatch, Arnold said.
The family gathered on their houseboat at the marina and took frequent trips onto the lake using the pontoon Clarence was last seen driving.
“All we can do is wait and hope,” his father said.
Members of the tight-knit marina community, many of whom know Clarence, have been searching, too.
His brother Charles has been at the marina since Clarence went missing. He and his brother had spent many summers on Laurel Lake, Charles said.
“We knew this lake like the back of our hands,” said Charles, who added that his brother was an excellent swimmer.
Several Berea Community graduates and friends of the brothers went to the lake Saturday to aide in the search.
“I’d rather find him in any condition than not at all,” said Melissa (Marcum) Lykins, who knew Clarence from their school days.
“I’m still hopeful,” she said.
Lykins and four others, including two volunteers from the Berea United Methodist Church, searched the lake on a rented pontoon from 4 to 9 p.m.