William "Dub" Lawrence knows more about the current tensions between cops and citizens than most people - and from both sides of the debate. As former Utah sheriff, he helped create the state's first SWAT team in 1975, serving over 16,000 warrants without issue. 30 years later, that very team he helped bring to life would be responsible for his son-in-law's death. His story and ensuing investigation takes the spotlight in the doc "Peace Officer."