An officer tells Jamie that all the cells are full, but when Eddie comes to talk to him, there is a cell with only 3 people in it in the background.
When Nicky is talking with Erin in Erin's office, the position of Nicky's bag strap changes with the shot of Erin's face to Nicky's face.
Nicky traps her boyfriend with the phony briefcase documents on her own without police backing. Since the documents were not actually real evidence they could not be used it to arrest him. However the video she sent her mother now puts him on the D.A.s radar for future investigations.