Jack Wheeler was a Vietnam veteran, former white house aid, current cybersecurity consultant, and a devoted husband and father. He dedicated his life to serving and being useful. In fact, as soon as he returned from Vietnam he made it his mission to make sure those fallen veterans were remembered by aiding in the construction of the Vietnam Veteran Memorial. He also fought hard to rid the stigma associated with mental health and the veterans who do make it back home. 

This man was a prime example of what it means to be a patriot... so how on Earth did he end up dead in a landfill? And what can we make of the bizarre behavior he exhibited on several surveillance tapes shortly before his death? 

Sources:

Screenrant.com

Radiotimes.com

Cnn.com

Todayshow.com

Unsolved.com

Wikipedia.com

and obviously, the Unsolved Mystery Episode itself. S2E1