A Delhi-based IT engineer was today arrested for allegedly posting a fake Orkut profile of his wife with obscene remarks, police said.Bharat Vats, a resident of Vasant Kunj, has been taken into custody following investigations into a complaint by his wife, also an engineer, that some one had posted her profile in social networking site 'Orkut' with "obscene remarks", a senior police officer said.His wife had filed the complaint on September 25.Investigations revealed that the man had done the act to defame his Noida-based wife and procure custody of their two-year-old son, the officer said.The couple got married in 2007 and went to the US and stayed there for two years. However, differences cropped up between them and they returned to India in 2009. Since the last six months, they have been living separately, the officer said.