[TigersEye]

You don't "detain" someone for an hour and a half for taking pictures.

You're right but they didn't. I gave the probable reasons he was detained in post #54.

[Henrietta]

He wasn't merely detained, he was subject to an illegal arrest. (Detentions magically transform themselves into "arrests" past a certain time point) The "reasons" you gave do not pass Constitutional muster, per Terry.