According to local ABC affiliate WABC 7, the canine conflict started because of a disagreement about a subway seat, and, as you can see, it all went downhill from there. Though the pit bull's owner Ruben Roncallo claimed his animal was a service dog and that the woman started the fight, he was charged with reckless endangerment and assault, and later charged on an unrelated harassment charge that also involved his pup.
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