Retired Sheriff Rich Stanek, a Minnesota police officer for 35 years and Tracy Walder, a former CIA officer and FBI special agent, join NewsNation to discuss the shooting at a Catholic school in Minneapolis. Police say the shooter, identified as Robin Westman, legally purchased the rifle, shotgun and pistol. Authorities also recovered a "manifesto," along with images showing phrases like “Kill Donald Trump." Westman, who once attended the school and whose mother worked there, left behind writings describing pain, mental anguish and intent to carry out the attack. Anchor Elizabeth Vargas delivers the biggest stories, without bias or opinion. Watch "Elizabeth Vargas Reports" every weeknight at 7p/6C on NewsNation. #VargasReports NewsNation is your source for fact-based, unbiased news for all Americans. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0...