“This Is Ahmed Mohamed’s Clock.” The boy didn’t build a clock, he took a clock apart, wired it up, and then put it in a box. There is no way a reasonable person would think this was merely an innocent electronics project.
UPDATE 19 September 2015: Says Jerry Pournelle, “There was no reason to handcuff him, but we had that in Los Angeles 20 years ago: officers had discretion on handcuffing people, and got pummeled because they handcuffed more Blacks and Latinos than White, and the Department took the discretion away: now everybody gets handcuffed, even though the cops find it absurd in many cases. On the other hand, there are plenty of cases where it’s a wise precaution, so if it’s handcuff everyone or handcuff no one, it has to be everyone, absurdities or not. I suspect it’s that way in Texas, too. One of the joys of diversity.”