Macklemore On Front Line of Ferguson Protest 'It's About Mike Brown'

Rapper Macklemore was one of thousands of people who protested in the streets Monday night following the decision in Ferguson, MO not to file charges against the cop who shot and killed Michael Brown

The Seattle native was seen marching in his hometown's protest -- which eventually turned violent -- with his hands in the air, joining the chant, "Don't shoot! Hands up!"

Macklemore tried to blend in, but was spotted by a KING 5 photog. When asked about his reasons for being there ... he put the spotlight on Brown.

Unclear if he was still marching when protesters clashed with police.