www.alphadictionary.com

Menticide:(MEN-tuh-syd))
noun: The systematic undermining of a person's beliefs, attitudes, and values.
From Latin ment- (mind) + -cide (killing).
Our compliance with the dictates of Donor Agencies and environmentalists not to use DDT amounts to suicide or at least menticide of our people

Also known as brainwashing.

A completely different take, twisting it to Russian, would be cop-killing. "Ment" is a common derisive slang term for cop in Russian. So "mentitsid" would mean copicide.