Security video appears to show a Philadelphia transit officer shove a man holding a toddler against the wall and grab him by the throat as they argued over whether he had paid the $2.25 fare.

The video shows the man swinging back at the officer and later being removed from the train still holding the small girl. He was handcuffed and charged with resisting arrest.

The Southeastern Pennsylvania Transportation Authority video shows police engaged with him for more than 15 minutes Thursday.

SEPTA Police Chief Thomas Nestel (nehs-TEHL') says fare evaders are typically removed and cited, but the man refused to comply.

Nestel has waged an aggressive campaign against fare evaders but says he doesn't train officers to grab people by the throat. He says an internal investigation is underway.