Sources:
https://www.dallasnews.com/news/2019/06/18/what-we-know-about-brian-clyde-the-gunman-who-opened-fire-at-the-federal-courthouse-in-downtown-dallas/
https://taskandpurpose.com/news/dallas-gunman-infantry
https://www.crossroadstoday.com/parents-tell-paper-dallas-gunman-discussed-suicide/
https://twitter.com/jbenton/status/1140684287810965504
https://www.dallasnews.com/news/2019/06/20/family-of-dallas-courthouse-shooter-brian-clyde-believes-he-wanted-to-be-killed/
https://www.washingtonpost.com/nation/2019/06/17/dallas-shooting-photographer-tom-fox/
https://www.dallasnews.com/news/2019/06/17/photographer-tom-fox-on-encounter-with-dallas-gunman-he-s-going-to-look-at-me-around-that-corner-and-shoot/
https://www.youtube.com/watch?v=z5fvbJCNTZo
 https://www.youtube.com/watch?v=04QeYbQUvmM
https://www.youtube.com/watch?v=ZWBdRaZXcoA