http://cbi.nic.in/
http://cbi.nic.in/interpol/interpol.php
Purpose of Interpol Top
Under Article 2 of the Organization's Constitution, Interpol's aims are:

"(a) To ensure and promote the widest possible mutual assistance between all criminal police authorities, within the limits of the laws existing in the different countries and in the spirit of the Universal Declaration of Human Rights.

b) To establish and develop all institutions likely to contribute effectively to the prevention and suppression of ordinary law crimes."

The limits of its operation are laid down in Article 3:

"It is strictly forbidden for the Organization to undertake any intervention or activities of a political, military, religious or racial character."

http://www.carnage84.com/official/misra/intro.htm
http://en.wikipedia.org/wiki/Leon_Frank_Czolgosz
http://www.whitehouse.gov/about/presidents/williammckinley
http://www.unafei.or.jp/english/pdf/RS_No54/No54_10VE_Sharma.pdf