Police Monday were trying to determine what caused a 20-year-old driver to run off a north Fulton County road and hit a tree.

Jonathan Ward Jaros of Roswell was driving a Honda Accord early Sunday when the vehicle ran off Martin Road east of Hillside Drive and struck a tree, Roswell police spokeswoman Lisa Holland said in an emailed statement.

When officers arrived on scene about 4:20 a.m., Jaros was dead, she said.

Holland said the wreck remains under investigation.

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Inventor Lonnie Johnson stands with his Super Soaker water guns at JTEC Energy on Wednesday, Oct. 29, 2025, in Atlanta. Johnson, a former NASA engineer, is currently working on a new energy technology through his company’s JTEC device that turns thermal heat into usable energy. (Natrice Miller/AJC)