runway. he survived but he had very severe brain injury. >> did he decide to fly again, at any point? >> he did. >> why do you think you want to fly again? he almost died. >> it's like being thrown from a horse. he wanted to be the person he was before. >> and he did it? >> he did. but it took a long time. >> mark's colleagues in the da's office admired his strength to fight through adversity. they also got a kick out of his weakness, his love for sugary snacks. he had a sweet tooth. he would eat people stuff. -- every monday, and we will get donuts for them, and he would always get their first. >> in 2011, mark and shannon got a new boss, that seemed to fill right in with their office family. the newly elected district attorney, mike mclelland. >> my name is michael clung, the criminal district warning for kaufman county. >> mike stepdaughter, christina foreman, says he loved the job. >> i think he really did