[NotAClue]

Unless you're at an extremely aggressive table, or you're at a table with a bunch of people that'll call pf raises with Kx, Ax, or Qx and once they hit TP on the flop wont let their hand go, you need to open-raise with JJ. Open-limping with it is a disaster, ESPECIALLY when you end up overplaying it.

As others have already said, at the very least check-call/fold the river. In certain circumstances I would fold the river to the raise. Since the CO is new to the table, you really don't have a read on him, so you probably have to call. But many times, the river completes a couple straight draws and a couple two-pair draws.