yoplait. smooth, creamy, and craved by the whole family. welcome back i'm melissa harris-perry. on wednesday, one of the former university of oklahoma fraternity members who was caught on camera singing a racist chant spoke publicly for the first time about the incident. levi pettit is one of the two students of the ou chapter of sae who was expelled from the university for leading the chant. after meeting with african-american clergy and civic leaders who pettit said helped him understand the meaning behind what he said, he spoke at a news conference where he began with this. >> let me start by saying that i'm sorry. deeply sorry. i'm so sorry for all the pain that i've caused and i want you all to know that directly from