I can't help but wonder if there was someone else (or multiple others, even) at JR's apartment leading up to 4:30. CR's lawyer early on said that CR "was not the last one to see Spierer that morning and three or four others saw her after". MB and JR add up to two. The lawyer could be wrong, though.
http://www.foxnews.com/us/2011/06/0...ompanion-has-no-memory-last-moments-together/
http://www.foxnews.com/us/2011/06/0...ompanion-has-no-memory-last-moments-together/