Court papers say a homeless man charged with pushing a man into the path of a New York City subway train told police his victim "rolled like a bowling ball" after he landed on the tracks.

The papers also say Naeem Davis blamed himself for the horrific death on Dec. 3.

The papers were made public Tuesday as Davis pleaded not guilty to murder and manslaughter charges at a Manhattan courthouse.

His lawyer says there's evidence that the victim was drunk and "went after" Davis.

Police say Davis watched the train strike 58-year-old Ki-Suck Han before leaving the subway station near Times Square.