File:Nevada Highway Patrol.jpg

Fair use in Nevada Highway Patrol
Though this image may be subject to copyright, its use is covered by the U.S. fair use laws, and the stricter requirements of Wikipedia's non-free content policies, because:
 * 1) It illustrates an educational article about the entity that the logo represents.
 * 2) The image is used as the primary means of visual identification of the article topic.
 * 3) It is a low resolution image, and thus not suitable for production of counterfeit goods.
 * 4) The logo is not used in such a way that a reader would be confused into believing that the article is written or authorized by the owner of the logo.
 * 5) It is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.

license
1) Copyright is unknown, but it is the logo of a government agency; 2) Logo is illustrating the agency at issue in an encyclopedia article; 3) No money or profit is involved; 4) Use should be governed by fair use.