Police seen as more trustworthy than other witnesses--but there's reason to think the opposite is true. http://www.nytimes.com/2013/02/03/opinion/sunday/why-police-officers-lie-under-oath.html?pagewanted=1&_r=2& …
@normative Source for Dershowitz quote: http://books.google.ca/books?id=g9K6wGURhOgC&pg=PA128&lpg=PA128&dq=dershowitz+police+%22almost+all+police+lie%22&source=bl&ots=b5wbqkEo1u&sig=rNWZ5gpA-9PM-lODeMHiRbOF9rQ&hl=en&sa=X&ei=UokNUfyyCISHygHY34DgBg&ved=0CDAQ6AEwAQ#v=onepage&q=dershowitz%20police%20%22almost%20all%20police%20lie%22&f=false …