Here's my theory, and it has to do with a small detail that no one has mentioned. There is blood in Judith's car seat, some have said it might be from a walker, WRONG, WALKERS DONT BLEED! (at least after they reanimate) which brings me to believe that the blood is from a human (non walker) but a human who has blood on their hands, after looking at the entire scene, the only survivor who got shot AND had blood on their hands - was Bob....remember he asked if "the bullet went through his back"? he reached for his back to feel the exit wound, Bob is still alive and THE ONLY ONE WITH BLOOD ON HIS HANDS, if judith is alive Bob was the ONLY ONE who would've grabbed her and ran....NOT Tyrese, if Tyrese grabbed judith and ran then why would there be blood in her car seat? she was rescued from a human survivor that had blood on his/her hands plain and simple. Tyrese running with his arms cradled could've been holding any number of things; ammo, food, water jug etc. So if you still believe that Tyrese took Judith then you HAVE to explain why there is blood in her carseat.