The practice uses high-voltage electricity to create lightning-like patterns. At least 33 people have died attempting it since 2016, according to the American Association of Woodturners.

"The fractal burning process typically uses a high-voltage transformer, often repurposed from a microwave oven, to flow current across wood items that have been soaked with a chemical solution ...

The sheriff's office said they believe that the equipment used for the fractal wood burning caused the electrocutions and also likely caused the fire, which started in the garage and spread to the ...