How to Become a CBI Officer?

This is asked many time here and You will never get a desired answer on this forum about this question,Look for relevant people to get an answer of your question. or visit CBI website if they have at all any.

http://www.cbi.gov.in/index.php

http://www.google.co.uk/search?q=Central+Bureau+of+Investigation+(India&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&redir_esc=&ei=yw7fS7vQCZ_80wSZgKnNBw

Could you please first tell what causes the Textile Engineer student to become the CBI (Central Bureau of Investigation, India, if I understood correctly) officer as a dream career?

Then go to http://cbi.nic.in/faq/faq.php#faq03 and read question 3:

"CBI recruits Sub-inspectors through the Staff Selection Commission (SSC), which publishes its recruitment notice in Employment News and other leading dailies. CBI also inducts officers in the ranks of Inspector of Police and above from the State and Union Territory Police forces on deputation. Non-police officers are also taken on deputation in CBI. The necessary details about various posts in CBI, recruitment/induction procedure, vacancy statement etc. are all posted on this website and the same may please be referred to. Special attention is drawn towards the 'Administration Manual' of CBI available in the 'About Us' link as well as the link 'Inside CBI' in this regard".