An Atlantoaxial fracture is also known as an internal decapitation, as in the head can be cut off from the rest of the body.
When the diplomat that Seth is trying to prosecute goes into the embassy of another country Seth asks how to get him out and mentions the real life case of Julian Assange the wikileak founder who found asylum in the Ecuadorian embassy. Leonard tells Seth they hadn't gotten him out, it shortly after the episode aired Julian Assange was taken out of the embassy to face charges.