They will know you were probably at a protest, but they hopefully won’t be able to tell you apart from other protestors. Hopefully they won’t be able to tell who did what. If police know you were at the protest you may get a visit later or watched though
You dress as black bloc, you get away, change clothes, but they’re still in your backpack. Police searches and finds the black clothing. Now what?
They will know you were probably at a protest, but they hopefully won’t be able to tell you apart from other protestors. Hopefully they won’t be able to tell who did what. If police know you were at the protest you may get a visit later or watched though