If you are a person of color, "Presumption of Innocence" does not apply today.
If you speak with a non-English accent or are heard conversing in a language other than English, "Presumption of Innocence" does not apply to you in these times.
If you dress differently, it may not apply either.
If you are within 100 miles of the coastline or a border, it no longer applies.
If any of those things are true, you may well be considered a suspect in some way, both by authorities and the general population.
This is not how it is supposed to be in this country. This is what is now the case, however.
This is a sad, sad state of affairs, and needs to be corrected.
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Growing up (56 years), going to public facilities including restaurants or pools, followed around stores, just going to school with nasty racist teachers - I have been harassed by someone exerting "power". My parents were hassled, my grandparents were hassled, my great-grandparents were hassled, my great-great-grandparents were just trying to deal with escape from slavery or born free but subject to capture anyway.
It's just that these daily "indignities" are finally being exposed and at least there is some outrage when they are.
You can look back at Rodney King in 1992 and one video that essentially "went viral" (pre- "world wide web" ) that stoked riots, essentially becoming what in the past would have been considered the last straw that blew the pressure cooker. Nowadays these internet stories and videos actually help to release the pressure a tweet at a time and perhaps helps to forestall cities burning down during "long hot summers". 
