Original story had them on a “massive manhunt” for the third. They later claimed that they had verified that there was no third person. I wouldn’t be surprised if there was, it was the handler of the other tow and was killed and disposed of to help Obama fight the meme of us importing those who want to kill us and to hide the extent of it...he’s been turned into Jimmy Hoffa....
If you have a third shooter along with half a dozen ME guys in the garage, that’s a cell. If you have a US husband with a foreign wife and contaminated evidence, then it’s a matter of an innocent US citizen being corrupted by a gal he met on line.