In 2007, Narayanaswamy inquired into a proposed land deal by the son and daughter of Kerala Public Works minister T. U. Kuruvilla; Kuruvilla was forced to resign after an investigation.
Narayanaswamy, Idukki District Collector, surveyed the land; much was government land, suggesting a violation of the Benami Transactions (Prohibition) Act, 1988, and Kuruvilla resigned.