These photos capture the grim reality of life in Baltimore's poorest neighborhoods

Over the past several days, the streets of Baltimore have erupted into chaos. Riots were sparked by anger over the recent death of Freddie Gray, who suffered a fatal spine injury while in police custody, but the seeds of that anger were sown long ago.

As Baltimore City Councilman Nick Mosby told Fox News on Tuesday, the protests are about the "social economics of poor, urban America."

Mosby described those protesting in the community as "showing decades old of anger, frustration for a system that's failed them."

AP photographer Patrick Semansky captured the poverty-stricken state of the Baltimore's poorest neighborhoods in a photo essay in 2013. It seems especially relevant today.