Are you sure that’s the perp? He looks different (older, too) in the Daily News photo.
Notice that he, his mother and brother were getting ready to escape. No mention of dear old dad.
The 9-year-old, who looks like a “white Hispanic” (his grandfather Juan speaks only Spanish) remained conscious long enough to give the name of the person who threw him off the roof. Otherwise the cops might have thought that the kid fell off the fire escape accidentally...unless a neighbor had seen what happened and was brave enough to tell the police. If the fall had killed the kid, as it easily could have, the perpetrator might have gotten away undetected.