[ez]

"I imagine it was his belligerent, uncooperative attitude coupled with suspicious behaviour that gave them just cause."

That still wouldn't be just cause to detain him. Being uncooperative is not a crime.

Oops, you ignored the "acting suspicious" part...

[Henrietta]

"Oops, you ignored the "acting suspicious" part..."

The police have to articulate what about his behavior is or was suspicious.

According to the Supreme Court, "[I]n justifying the particular intrusion, the police officer must be able to point to specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant that intrusion."

I don't think that the taking of pictures in a public place, and asking about a funny box near a national monument is a specific and articulable fact which would reasonably justify the intrusion of the police on this guy's right to be left alone. You don't agree with me, but hey, it's a free country...or used to be!