I have seen a few photos of the ‘clock’...a mess of circuit boards and wires. Have you seen any photos which actually show anything that looks like a clock - as in a display that shows the time?
Or did the kid just throw a bunch of electronics in a briefcase, and add an alarm clock to make a hoax bomb?
That's how I saw it but was taken to task by quite a few FReepers for my default position of not trusting the yute and for siding with the school and police. The track record of muzzie behavior has made me personally choose the "guilty until proven innocent" approach with them.