I'm fairly certain I read many months ago that it was a statewide guideline adopted recently, that is just within the past few years
Here is what this article quotes a defense motion saying:
"He ignored the actual facts and improperly injected himself in the photographic lineup proceedings, which violates police policy," the motion reads.
Here is the link:
http://abcnews.go.com/US/LegalCenter/story?id=1909167&page=1