We now know how a Mother and son died in their west Omaha town home earlier this week.  

Douglas County sheriff's investigators say Maureen Flanagan died of blunt force trauma to the head.  

Preliminary autopsy results show 18 year old Cooper Flanagan's death is consistent with carbon monoxide poisoning.  His body was found in a car in the garage.  

The coroner is awaiting the results of toxicology tests to confirm his cause of death. Sheriff investigators continue to review, process and analyze evidence collected at the scene in an effort to piece together the events that led to the deaths.

The Coopers were found after a concerned family friend stopped by and found mail piling up.