August 1, 2013 1:02 pm Philly DA Speaks Out on Riley Incident Philadelphia District Attorney Seth Williams says the racial slur incident involving Philadelphia Eagles wide receiver Riley Cooper can be used as a teachable moment. US & World Videos 2:54 UPenn leaders reiterate to pro-Palestinian protesters that they need to disband 1:44 Pro-Palestinian protesters remain on UPenn's campus despite warnings to disband 1:30 Protests calling for ceasefire continue at Penn 6:33 Family affair: Former Eagle and new Eagle Jeremiah Trotter and Jeremiah Trotter Jr. speak out 0:20 Teen girl shot in Southwest Philly, suspect in custody