BK knew well before the end of Sept, 2022, that he was not performing satisfactorily in his position as a TA, and the problems and complaints against him only piled up as the semester went on, as documented in the linked article attached. I am convinced that he knew before or certainly by Nov 13, that he would not be returning for the spring semester, as the almost certain loss of position also meant financial loss, including loss of tuition waiver and a monthly stipend. I believe the rapidly-approaching end of fall semester was key in BK's determination to proceed with what I think had become an uncontrollable urge to commit the murders that we now know that he planned for and committed. It may have been as simple as, he knew that he was running out of time. When he left Pullman on Dec 13, 2022, I think BK thought he was leaving that area forever. He had no idea that his DNA would take him back, and likely make that area the last place that he will ever live. JMO
His attitude towards women was cited as a key concern, with the criminal justice student allegedly having a ‘sexist attitude towards females he interacted with at the school’
www.the-independent.com