A 2011 photo shows the Dietl family on Kevin Dietl’s first day at A.T. Still University Osteopathic Medical School in Kirksville. From left are Diana, Kevin, Michele and John Dietl. Kevin Dietl took his own life on April 23, 2015, a few weeks before his medical school graduation. The Dietl’s story is included in a documentary, ‘Do No Harm,’ which will screen in St. Louis Oct. 15 and 16.