Here is a [url=http://www.bungie.net/Forums/posts.aspx?postID=73274577]thread[/url] with some additional information. The Jason Jones working on Reach/ODST wasn't the same. There is a second Jason Jones at Bungie. So except for some advice on the missions of Halo 3 he hasn't contributed to any Halo game after Halo 2. [Edited on 11.28.2012 1:13 PM PST]