Original sentence: Ruppert (February 3, 1951 – April 13, 2014) was an American author, a former Los Angeles Police Department officer, and investigative journalist and peak oil awareness advocate
Edited sentence: Ruppert (February 3, 1951 – April 13, 2014) was an American author, a former Los Angeles Police Department officer,, so-called conspiracy theorist, and investigative journalist and peak oil awareness advocate