PARK CITY, Utah — The dramatic film ‘‘Fruitvale’’ and the documentary ‘‘Blood Brother’’ won over the audiences and the Sundance Film Festival judges. Both US films took audience awards and grand jury prizes Saturday at the Sundance Awards.

‘‘Fruitvale’’ is based on the true story of Oscar Grant, who was 22 when he was shot and killed in a public transit station in Oakland, Calif. First-time filmmaker Ryan Coogler, 26, wrote and directed the dramatic narrative.