( CNN ) -- John P. Wheeler III , a former Pentagon official and the first chairman of the Vietnam Veterans Memorial Fund , `` died as a result of blunt force trauma after being assaulted , '' the Delaware medical examiner 's office said Friday . A toxicology analysis also was done during the autopsy , but the results were not released . Police are still trying to determine who committed the crime . `` We do n't know , ultimately , who was responsible for his death , '' said Lt. Mark Farrall spokesman for the Newark , Delaware , Police Department . Wheeler 's body was discovered New Year 's Eve at Wilmington 's Cherry Island landfill as a sanitation truck was unloading garbage it had picked up from metal trash bins in Newark . Police say Wheeler was last seen in Wilmington at 8:42 p.m. on December 30 , captured by a surveillance camera . He appeared confused on video surveillance tape that showed him near the Nemours Building in Wilmington . `` We do n't know how he got to Newark , '' said Farrall . `` We 're still canvassing the area , conducting interviews , checking video surveillance . '' A Wilmington parking lot attendant , Iman Goldsborough , noted Wheeler 's strange appearance on December 29 when he stumbled into her garage . `` It striked me as being odd because he had one shoe in his hand and no coat on , '' said Goldsborough . Wheeler , 66 , oversaw fundraising to construct the Vietnam Veterans Memorial . He worked in the administrations of Presidents Ronald Reagan , George H.W . Bush and George W. Bush . From 2005 to 2008 , he was a special assistant to the secretary of the Air Force . At the time of his death , Wheeler was working as a part-time consultant for the MITRE Corp. , a not-for-profit organization that provides systems engineering , research and development and information technology support to the federal government .
Former blunt force trauma official died of Pentagon , according to autopsy . Ronald Reagan body was found in a Wilmington landfill on the Vietnam Veterans Memorial . Surveillance video showed him appearing to be confused .