Was leaning toward a juvenile with less yellow on the throat.
Forgot to take photo of salvage tag. This was a photo + collected bird. Contextual photos for surroundings shown in photos 7 and 8. This glass building is surrounded by light up trees at ground level. Difficult to ID bird due to the condition of the body, we had a storm the night before and it made the bird very wet, darkening a lot of the colors. I guessed mourning warbler but had many doubts, help me ID please!
Found dead by a large window. Picked it up to move it out of sidewalk!