From the amount of trash, it looks like it has happened numerous times. I have not seen him before. I confronted him and his only response, which came as he was hurrying away, was that he was accosted the night before by someone with a gun.

We stood on the corner to see where he was headed, but with the cars parked on the street, we lost him somewhere near Kimball. He was an Asian man, probably in his mid-40s, about 5'7" or 5'8" and 150 pounds. He was wearing a light blue shirt.

If you see him coming again, call 911. What he is doing is illegal and there's nothing wrong with calling the cops for that.

Let him know that:

1. You have called the cops
2. That you are filming him/taking pictures of him (assuming you have a camera on your phone)
3. That he can be fined 10,000 dollars if caught

http://www.phila.gov/streets/illegal_dumping.html

I told him several times that it was illegal, and would have called the police had my cell phone been on me. I have been trying to call the santiation police to file a report but cannot get through.

Yeah, the SWEEP people are usually concerned with commercial violations, but they may go after this guy (if he can be ID'd ) because he's dumping stuff into a storm drain