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Law enforcement canvasses the scene in Cumming, Ga., on Friday, June 6, 2014, after a man shot a deputy at the Forsyth County courthouse before dying in a hail of bullets, officials said. Authorities say Dennis Marx was armed with guns, explosives and other supplies when he arrived at the courthouse Friday morning. He died at the scene after being shot.

GBI probing Forsyth County deputy shooting

CUMMING, Ga. - The Georgia Bureau of Investigation continues to investigate the fatal shooting of a heavily armed man who shot a deputy doing a security check at the Forsyth County courthouse.

The agency said in a news release Monday that an autopsy showed 48-year-old Dennis Marx died from multiple gunshot wounds suffered during a shootout with deputies Friday.

Forsyth County Sheriff Duane Piper asked the GBI to do a use of force investigation. The findings will be presented to District Attorney Penny Penn.

The courthouse reopened Monday after repairs were made over the weekend to walls and windows struck by bullets.

Authorities have said Marx had an assault rifle, two handguns, explosives and supplies to take hostages.

3 people drown at Lake Lanier

GAINESVILLE, Ga. - Authorities report three people drowned at Lake Lanier over the weekend.

Hall County Fire Services said one death occurred Sunday as a man attempted to walk across a sandbar to an island.

Fire officials said the man apparently fell into deeper water and did not resurface. His body was recovered.

Separately, a 15-year-old teenager and his 51-year-old father also died. Witnesses told authorities that the teenager went into the water to retrieve a ball and became distressed. The father went into the water to help the child, but he did not resurface. The bodies of the father and son were found Sunday afternoon.

Beaches closed after sharks seen

ORANGE BEACH, Ala. - Some Alabama beaches are closed because of a swarm of sharks swimming just offshore.

Orange Beach is flying double red flags to let swimmers know to stay out of the water around Alabama Point at Perdido Pass.

Aerial video shows large numbers of sharks swimming in shallow waters, and dorsal fins are sometimes exposed.

No attacks have been reported.

Beach safety supervisor Melvin Shepard said the beach closings began over the weekend, and fire officials said they continue Monday.

Shepard says anyone entering the water can be fined. While most people are staying out of the surf, a few are still venturing into the Gulf of Mexico.

Shepard said the shark swarm may be linked to a large number of fish carcasses in the water during red snapper season.

Boater education classes coming up

SOCIAL CIRCLE, Ga. - Georgia Department of Natural Resources officials are reminding Georgians that boater education courses soon will be required for some vessel operators.

Officials say boaters born on or after Jan. 1, 1998, will be required to take the state's boater education course beginning July 1.

Department officials said boaters will be exempt from the course if they are licensed by the Coast Guard, are operating a vessel on a private pond or lake or can prove that they've completed a similar approved boater education course in another state.

Officials said the course will be offered in class, online and through a home study program.