<human>: Can you condense the text into a few key points?

I'm not sure if this is the right place for this post, but I couldn't think where else to put it.  This is a really weird situation and I need help figuring out what to do.

I met this guy on Craigslist, and we started chatting on Kik.  It was supposed to be a strictly platonic thing, but he started sending me really sexual stuff - dick picks, his naked wife, videos of them having sex, etc.  I told him several times I did NOT want to receive that stuff, but he continued to send it.  I would have just blocked him and moved on, but what really freaks me out is that he's a high school teacher and interspersed with all this sexual stuff were pictures and videos of his students that were clearly taken without their knowledge.  Occasionally he'd caption them with seemingly harmless remarks like "8/10", but given all the other pornographic stuff he was sending me I found it all really disconcerting.

I feel like I should report this to someone but I don't know how.  All I have are his first name and last initial, and that he works in Maryland.  Seems like very little to go on.

What do?  Should I just drop it even though it seems super creepy?
<bot>: Creepy dude on kik sending me unwanted pornographic pictures and videos, mixed in with (non-sexual) pictures and videos of students in the high school were he teaches?  Wtf?