Quotation marks would only have to be used on thoughts if the<br />thoughts were someone else's. If the thoughts came from a book, computer source, or some other source, then quotation marks should be used. However, the writer of the essay does not have to quote his or her <i>own</i> thoughts.
As of 2011, there are at least 25,000 sworn (and armed) law enforcement officers working for federal agencies not traditionally associated with law enforcement, and 3,800 of them were specifically criminal investigators.
The Oldest & Most Versatile Federal Law Enforcement Agency in the United States. For over 200 years, U.S. Marshals and their Deputies have served as the instruments of civil authority by all three branches of the U.S. government.