>> shepard: police in the state of delaware report tonight they have no suspects in the death of a former pentagon official. he was 66-year-old john wheeler, a retired army officer who served in both bush administrations and under president reagan. this surveillance video from late december appears to show a disoriented wheeler. but police say they don't know of any illness that would have caused him to have such behavior. the next morning, a worker at a wilmington landfill reportedly saw wheeler's body fall from a garbage truck. our senior correspondent eric shawn dispatched to investigate and live from new castle, delaware tonight. acre, investigators are hoping new clues will shed light on this. they don't have much of anything, do they. >> yeah, shepard, interesting clue, why was his cell phone supposedly found inside that house? that's the house across the street from where they live. the house that belongs to the neighbor that they are suing because it's too big. the house police are investigating, reportedly, whether or not he may have set off smoke bombs in that house