PHILADELPHIA (CBS) –– Police say a man has been arrested for allegedly taking inappropriate pictures of a sleeping SEPTA rider.

Wednesday morning on the SEPTA R5 train, police say 34-year-old George Tai Kim took advantage of a woman who was sleeping next to him. Kim, who did not know the woman, was caught taking pictures up the female passengers dress.

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“I was appalled, just like anyone else would have been,” SEPTA Officer Don Noz said.

Kim reportedly took at least 50 pictures of the victim, who according to Noz, had no idea what was going on. Noz, off-duty and dressed in plain clothes, was sitting across from Kim and the victim as he snapped away on his cell phone.

“She heard my voice, talking to him and woke up, and didn’t even know what was going on until she was awakened by my voice,” Noz explained.

Watch the video…

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Noz arrested Kim on the spot.

George Kim, a married father with two children, told them he was riding the train to work in Center City. He’s a pensions specialist at the board of pensions for the Presbyterian Church.

Kim is being charged with Invasion of Privacy and Disorderly Conduct.

“He didn’t know there was a police officer right next to him while he was doing such a terrible thing. In feeling for the woman, I was glad that I was at that place at that time, to try and help her in a way,” Noz said.

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Reported by Dave Huddleston, CBS 3