Don't know what happened between those dates but...
In March the Iraqi's picked him up in Mosul and got all his vital information (where he was staying, nationality, etc.) then turned him over to the MPs. Any bets the terrorists were given his hotel location by Iraqi "police"? Probably a reward for information leading to unguarded Americans.
Anyway, the US had him in what should have been considered protective custody for 13 days. Right up until his parents filed a lawsuit against the USA on March 5th. He was released the next day thanks to his parents suit. Terrorist were probably living in his hotel room in Baghdad waiting for him by the time he got there.