MSNBC’s [Melissa Harris-Perry Show](http://www.nbcnews.com/id/46979745/vp/51025477#51025477) invited Colorlines investigative reporter Brentin Mock to discuss the aftermath of the [BP oil spill](http://colorlines.com/archives/2012/11/bp_settlement.html) three years later, as well as the ongoing civil suit to determine who is responsible and how much they should be paying. "The oil is still out there in the gulf. There’s still about a million barrels of oil unaccounted for. Tar balls are still washing up onto the coast."