Smith vs. Cumming
US Court of Appeals , 11th circuit .
” First Amendment protects the right to gather information about what public officials do on public property , and specifically , a right to record matters of public interest . ”
There are some others that actually expanded those rights to open view . In other words , you cant follow them into a house or things like that , but you can stand out on the street . Whatever they do in open view , but you have to be in a public area . ( street , sidewalk , etc . )