All suspicionless checkpoints 100% illegal. We must refuse them. Read details about this stop here:
https://www.youtube.com/redirect?v=YTG1EHw1XZw&event=video_description&q=http%3A%2F%2Fcallmegav.com%2F2014%2F03%2Fcongressional-candidate-refuses-checkpoint&redir_token=ZDeTbmyrdKgNGDA79sH6iwQGID18MTU1MDMxNDY2MEAxNTUwMjI4MjYw
You can also get some tips for filming police and officials on this post:
https://www.youtube.com/redirect?v=YTG1EHw1XZw&event=video_description&q=http%3A%2F%2Fcallmegav.com%2F2014%2F05%2Ftips-from-for-filming-law-enforcement%2F&redir_token=ZDeTbmyrdKgNGDA79sH6iwQGID18MTU1MDMxNDY2MEAxNTUwMjI4MjYw