article_snippet: Mourning: Memorial messages were left on building where Robinson was shot - blood can be seen above spattering the walls and floors from the killing .
article_snippet: Protests: This image from Wednesday shows activists on the streets of Madison in the wake of Robinson's death .
article_snippet: Robinson's death was the latest in a string of shootings by police nationwide that have heightened racial tensions.
article_snippet: Some protests turned violent in Ferguson, Missouri after an unarmed black man was fatally shot last August, and this week two policemen were injured from gunfire during a demonstration in front of the Ferguson Police Department.
article_snippet: The shooting has highlighted local concerns, prompting open letters from nearly 90 religious leaders and many local politicians calling for action to bridge racial inequality.