janie, from past cases the reports were not back for weeks. In many urban areas, especially during the Holiday seasons it could even be longer.
Example: Karen Swift(TN) was abducted 10/30/2011-Her remains were sent to the ME on 12/10/2011-
http://www.stategazette.com/story/1796485.html
Sheriff's dept., TBI awaiting coroner's report on Swift (12/20/11)
Dyer County Sheriff's Department investigators and the TBI are still awaiting the results from the Shelby County Medical Examiner's Office for the cause of death in the Karen Swift murder case.