By Bree Burkitt and BrieAnna J Frank • Jun 17, 2019 A philanthropic arm of Jay-Z's entertainment company Roc Nation has offered to provide legal support for a Phoenix couple that accused police of using excessive force and threatening to shoot them in an incident caught on video. Dravon Ames, 22, and his pregnant fiancée, 24-year-old Aisha Harper, were pulled over by Phoenix police near 36th and…