Who knows. Maybe.
When people don’t act on their instincts and horrible things happen, everyone wants to know why they didn’t say something. When folks do act, and are wrong, they should not get a ration of ridicule. The man behaved in a way she found suspicious. She erred on the side of caution. She did the right thing.
We can't condone the violation of constitutional rights over fear or suspicion from something as benign as the mere possession of a camera or cell phone. Even if he was taking photos of children, there is nothing illegal about overt photogrphy of fully clothed people engaged in legal activities in a public space.
I had a similar experience several years ago: Two state troopers detained me for nearly 30 minutes, in a public park, tearing apart my vehicle in search of a firearm that didn't exist. Apparently a busybody saw me stuff a "dark metallic object" into a knapsack. I was not under arrest, but not free to leave. The dark metallic object was a dangerous set of birdwatching binoculars that my kids had given me for father's day, and the park was promoted by the state as a sanctuary for migratory birds. (FYI -- although I had a concealed carry permit, I did not, as a law abiding citizen, have firearm on me at the time because the public park was a gun free zone.)
Does that mean that we should call the police every time we see a young black male in a mini-mart wearing a hoody or pants below his ass or an Asian behind the wheel of a car?