By now, we know that the Saudi Police, given a repreive from confining schoolgirls to burning buildings, had found this terror cell and arrested, or tried to arrest them. This is just conjecture, but is it possible that they were allowed to escape? Not as a matter of official policy necessarily, but by one or more of the arresting officers. To me, it just seems unlikely that 19 guys managed to walk away, or even drive away, from a firefight with police who were serious about arresting them. Given that this is Saudi Arabia we're talking about, concern for human life probably wasn't the officers' most pressing concern.