(Former Special Director – Central Bureau of Investigation)
Born to an agricultural family in the small village of Devarayapuram in Coimbatore District, Tamil Nadu. He obtained his B.Sc. degree in Chemistry and Agriculture from the Annamalai University, and later worked in the field of agriculture on the ancestral farm of his native village and then worked for a year. He also obtained a Bachelor of Law degree from Madras Law College, and enrolled as an Advocate in the Bar Council of Madras.
After passing the Combined Competitive Examinations for Senior Civil Services, he joined the Indian Police Service (IPS) in 1964. Karthikeyan underwent extensive training in that field including study at the National Police Academy in Mount Abu.