A bouquet of flowers wrapped in Valentine’s Day paper rested beneath the business sign of Dowsey Inc. on State Highway 181 Monday morning, memorializing the lives of two Dowsey brothers who died in a boating accident off the coast of Louisiana last weekend.

Family members, staff and friends gathered at the family business in Fairhope Monday afternoon to mourn the deaths of Dwayne “Wayne” Dowsey, 61, and Randall “Randy” Dowsey, 58.

They were two of the four people who died Feb. 12, when their sport fishing boat capsized about an hour after they left Venice, La., Saturday morning on a fishing trip with two other Fairhope residents and one other person.

“They were my brothers,” Mark Dowsey said Monday of Wayne and Randy, at the heating, air conditioning and plumbing company owned by Wayne.

Randy’s son, Heath Dowsey, 33, of Fairhope survived the accident, after being rescued shortly after 1 p.m., according to Louisiana officials.

Kerri Burns, 33, of Fairhope, and Kenny Mock, 58, of Metarie, La., also died in the accident.

“It’s the worst accident I’ve heard about in a long time,” said Adam Einck, spokesman for the Louisiana Department of Wildlife and Fisheries that is investigating the accident. “We had a triple fatality last summer. But they’re all bad.”

“They left out at around 6:30 a.m. and about an hour later between 7:30-8 a.m. something happened to one of the motors to cause it to shut off,” Einck said Monday. “When they looked at the back of the boat, it started filling up with water, and they shut the other motor off. Within minutes the boat had capsized.”

The investigation into the cause of the boating accident in the Gulf of Mexico about two or three miles south of the Dowsey’s fishing camp in Venice is expected to conclude within two weeks, Einck said.

“We don’t know at this time what happened to cause the first motor to shut off, or why it was taking on water,” he said of the 25-foot Grady White sport fishing boat with twin 150 horsepower outboard engines. “We don’t know why they cut the other engine off.”

Einck said investigators had interviewed Heath Dowsey after he had been rescued.

“He didn’t get picked up until shortly after 1 p.m.,” Einck said. “He told investigators that no one was wearing life jackets before the boat capsized. They were able to locate four of them, but they were not able to put them on before going in the water. They were basically just hanging onto (the life jackets) in the water.”

Einck said Heath climbed on top of the capsized boat, from where he was rescued more than five hours after the accident began.

Autopsies on the three victims were performed Monday morning, said Scott Polk, chief investigator of the Plaquemines Parish Coroner’s Office.

“All four autopsies were done this morning at the Jefferson Parish Forensic Center in Harvey, La.,” Polk said Monday afternoon.

The cause of death of the four victims has tentatively been determined as drowning instead of hypothermia, he said.

“I know there was some concern about hypothermia,” Polk said. “But it’s going to be drowning pending toxicology results.”

The Dowsey family will receive friends during a visitation from 5 p.m. to 9 p.m. today at Wolfe-Bayview Funeral Home in Fairhope.

Funeral services will be held at the chapel there at 10 a.m. Thursday, with graveside services to follow in Memory Gardens in Fairhope.