"Second degree murder. n. a non-premeditated killing, resulting from an assault in which death of the victim was a distinct possibility. Second degree murder is different from First Degree Murder which is a premeditated, intentional killing, or results from a vicious crime such as arson, rape, or armed robbery.
Only reason I wouldn't call it First Degree, is that she didn't know if he would be killed or severely injured. Didn't care, either, since she then exited the bus and never showed even a flicker of concern for the man lying on the pavement at her feet.
"...which death of the victim was a distinct possibility."
Seemed to me a bit of a fluke that he died. I mean it was viscous and irresponsible and nasty shove, but I would not expect it to have been fatal. Not sure if it rises to what ever "distinct possibility" is here.