A married Irish businessman was arrested Thursday on suspicion of killing a woman whose body was found in the mountains near Dublin a year after she vanished. Police said the man, 41, whose identity has not been released, was picked up Thursday at his home in Foxrock, an upscale Dublin suburb, the Irish Independent reported. Police, working with prosecutors, were expected to decide Friday whether to bring formal charges. The man can be held for only 24 hours without charge. The body of Elaine O\'Hara, 36, was found in September in the Dublin mountains. She was last seen in August 2012, and her car was found two days later in Shanganagh Cemetery near her family\'s home. Investigators said O\'Hara, a childcare assistant who also worked for a news agent, had been using a website to find a romantic partner. The man arrested Thursday was apparently identified through searches of her computer and cellphone activity. Police searched the house where the man lives with his wife and two children, and seized computers and two vehicles.