Police said the suspect, Hemy Zyi Neuman, who was arrested late Tuesday, was a supervisor of Andrea Sneiderman, wife of the victim, Russell "Rusty" Sneiderman, 36, of Dunwoody, The Atlanta Journal-Constitution reported.
General Electric Energy confirmed Neuman and Andrea Sneiderman worked at the same facility, the newspaper said. Neuman was being held in the DeKalb Country Jail without bond.
Dunwoody police declined to describe a possible motive for the slaying of Russell Sneiderman. Neither man had a criminal record, the newspaper said.
Sneiderman had just dropped off one of his two children at daycare when he was gunned down by a man in a hooded sweatshirt who fired four shots from close range before calmly driving off in a minivan, police said.
Neuman, a 48-year-old father of three, had emigrated from Israel to the United States in 1980, and in 1999 joined General Electric where he was a mid-level manager. It wasn't known when he met Andrea Sneiderman, who worked as an engineering manager at General Electric, or how he met Russell Sneiderman, a Harvard-educated entrepreneur with a background as a certified public accountant and financial consultant.
Neither police nor the company would say whether there had been a falling out between Sneiderman and her supervisor.