Hmmm?? The plot doth begin to thicken. Matt has a good point; it does have a back pattern (scapular patches) similar to that of a Red-tailed Hawk, but not IMO as dominant as one would expect to see in a RTH.
I referred to my trusty Wheeler's Raptors of Eastern North America. Plate 348 shows a perched "Eastern" juvenile Red-tailed Hawk in a pose quite similar to the one shown here. The photo in the book shows a heavier white pattern overall on the back, especially on the wing coverts and a very broad white supercilium. And the tail bands seem narrower than the ones on the bird shown here. Plate 217 in the book shows a back view of a juvenile "Southern" Red-shouldered Hawk. (There is no corresponding photo of an "Eastern" juvenile RSH) It also has a back pattern with white marks, but they are not as dominant as on the RTH; and the tail shows narrow bands that look much like the bands in this birds tail. I also am not sure if we are seeing a part of the upper breast on the bird in this thread, because, if we are, it looks red, or dark, to me, and on a RTH, it should be light or white. If, instead, it is a shoulder we are looking at, it does appear to be rufous in color.
Bob