Airtight alibi and negative DNA test

A kooky, publicity-seeking DA charged John Mark Karr, but now has to release him because of an air-tight alibi and a negative DNA test.

Sound like the release is a no-brainer? I would think so, but the Duke lacrosse players are still being prosecuted. The NY Times reviewed the entire case file, and says:

Mr. Nifong, the district attorney, has said that a woman?s identification of her attackers -- even without physical evidence -- is enough to send a rape case to a jury.

As the article explains, the Duke accuser (Crystal Gail Mangum) was not really even able to identify her alleged attackers.

The racist and pro-prosecution biases of the above NY Times story are exposed in this Slate article.