Pentadic criticism, developed by Kenneth Burke, “gives to the analysis of human motivation through terms derived from the study of drama.” Burke believed that in our deployment of rhetoric, we “constitute and present a particular view of our situation, just as a play creates and presents a certain world or situation inhabited by characters in the play.” In the field of journalism, for example, journalists deliver information by way of answering what we’ve come to understand as the most important questions when passing on knowledge and telling a story: who, what, when, where, why, and how. Rhetors, in less than explicit terms, do something similar — in their quest to imbue their listeners with knowledge or newfound understanding of a situation, they do so “using the five basic elements of a drama—act, agent, agency, scene and purpose." It’s these five elements that fulfill what Burke calls the pentad. Rhetors "use rhetoric to constitute and present a particular view of… [the] situation, just as a play creates and presents a certain world or situation inhabited by characters in the play” (Foss, Sonja K. “Pentadic Criticism." Rhetorical Criticism: Exploration and Practice. Long Grove, IL: Waveland, 2009. 355-86. Print).
To apply this to this particular artifact, we would need to identify the pentad that the rhetor (Sue Klebold) has constructed, and ask how it informs our larger understanding of the goal of her rhetoric. This selection in particular appears to be Sue Klebold’s understanding of the act (the killing of 12 students and a teacher) and the agent(s) (her son, Dylan and his friend, Eric) — here, she names two agents because of the nature of the situation she’s describing, but as the speech goes on and we’re able to uncover the remaining elements of the pentad, we’ll find that she consistently refers to a sole agent (her son, Dylan).