Wayne Burkhart, 68, built a four-car parking garage under his home connected to a four-car working garage.

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Jordan identified the dead as Ralph Frazier, 50, of Buford, Georgia, and 41-year-old Rachel Burkhart of Corryton, Tennessee.

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Jordan said Burkhart died when she was struck by a tree at a popular swimming hole near the park's Abrams Creek campground.

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After an outbreak of fires on Thursday, authorities arrested two men, but said at the news conference Monday that they didn't believe those two were connected to Mr. Burkhart.

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Given his stocky appearance and hairstyle in the security-video footage, Mr. Burkhart was nicknamed "Meatloaf Seagal" by users of the microblogging site Twitter, a reference to the singer Meat Loaf and action-movie actor Steven Seagal.

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