That's not because the two shootings are directly connected but rather because the Wisconsin attack was influenced by the Columbine attack. And the CEO killing has many of the same hallmarks that could lead to it influencing future attacks as well. To examine how likely that is, we have former FBI agent and active shooter research pioneer Katherine Schweit back on the show.

Schweit was part of the team that began tracking active shooter events in the wake of the Sandy Hook attack. She helped create the framework for responding to them for both law enforcement and civilians. She agreed there is reason to think the CEO killing could have a similar effect to that of Columbine.

She said it's hard to know what might happen with future assassination attempts, but the messaging and viral nature of the CEO killing make copycats more likely. But she said she has seen progress in combatting active shooter incidents, with the number falling the past two years. And the same tactics could be used to reduce copycats as well.

Special Guest: Katherine Schweit.

That's why I wanted to bring on an expert in active shooter situations to give some insight into what causes these events and how they might be prevented. There are few people with a better understanding of the situation than the person who created the FBI's research program on active shooters: Katherine Schweit.

She literally wrote the book on how to stop the killing.

Schweit created the FBI's definition of "active shooter." While most media or activist counts for "mass shooting" focus on how many people are shot or killed, the FBI doesn't have an official definition for the term. Instead, it focuses on identifying people who attempt to carry out random public shootings regardless of whether they are successful.

That makes it narrower than most definitions used by major media outlets, which incorporated many gang or crime-related shootings, but broader than definitions from the Associated Press or Mother Jones that focus on mass shootings where the attacker is able to kill many people. Schweit said that was the goal of her approach since it gives an opportunity to study trends that appear among those who attempt these attacks.

She said nearly all of the active shooters the FBI has profiled over the past decade are young men. Most use handguns. And most are triggered by a combination of different stressors such as financial distress or social ostracization.

Shcweit said the FBI's research has identified ways that shootings can be prevented. She said a big part of the solution is for people to speak up when they notice the warning signs somebody may be spiraling toward violence. She even explained a recent example where a co-worker successfully stopped a likely attacker after he threatened to carry out an attack.

Plus, Contributing Editor Paul Crookston joins the show to talk about the flood of post-Bruen lawsuits.

Special Guest: Katherine Schweit.