I recently watched this video on YouTube: https://www.youtube.com/watch?v=FSJTxalznxE
It's of a man open carrying a shotgun and filming from a public street. Nothing he did was illegal which later in the video is even confirmed by the female officer.
Yet when the man asks the cop if he was being detained she responded "Yes" and when asked for a reason, she said something along the lines of I'm carrying out an investigation from a call we received.
I read another post on this website about what constitutes probable cause and it's my understanding that in the instance of this video, the police officer did not have probable cause to detain this man.
Given that there is no probable cause as per my personal understanding of the situation and that no law was broken, according to the officer's own words, would it be illegal to walk away from the cops?
Bonus question: If this man decided to run away, what reasons do the cops have to chase after him and if they did in fact chase after him, what would the reason for his arrest be?