Can your citizenship be revoked? - Part I
If you became a citizen through naturalization, it is possible that your citizenship can be revoked, but only a couple of circumstances will trigger that possibility. One example is if that naturalized US citizen was convicted of a crime involving drugs before they were naturalized and didn't disclose this during the citizenship process they may have to worry about their citizenship getting revoked once USCIS finds out.
If this scenario has happened to you or someone you know, you should consult with an immigration attorney.