Complex sentence: He then smirks and looks into the rear view mirror of the car in which his reflection is not visible and Anjali seems to be leaning on nothing, thus conveying that he did die in the swamp and is now a ghost.
Split into simpler sentences: He then smirks and looks into the rearview mirror of the car, in which his reflection is not visible and Anjali seems to be leaning on nothing. This conveys that he did die in the swamp and is now a ghost.