Tammy Haas spent her last night alive at a homecoming party. She left early with her boyfriend and was never seen alive again. She was found a few days later by a golfer who was looking for his lost golf ball. She had died by the way of a broken neck, but virtually no other evidence has ever been uncovered. Who killed Tammy Haas and why?SHOW NOTEShttps://en.wikipedia.org/wiki/Yankton,_South_Dakotahttps://www.nbcnews.com/feature/cold-case-spotlight/cold-case-spotlight-t...