Dennis Francis said there are a number of questions they could be looking to answer. "Was that a stolen weapon? Where did it come from? How did it get into his or her possession?" Francis said. "It's not just limited to that." Autopsies from the medical examiner's officer are pretty standard in fatal shootings, but take time to complete. "The idea is not how fast you do it," Francis said. "It's how well you do it and is the interest of justice served by this investigation?" In this particular case, Francis said the most useful information will likely come from a Knoxville Police Department officer's body camera.