Thomas H. Kirby, a 72-year-old Albuquerque resident and noted radiation physicist, was shot dead at a home on the 5000 block of Larchmont Drive on the evening of October 29, 2024. Officers responding to reports of a shooting found Dr. Kirby deceased at the scene. He had a long career that included work at MD Anderson and the University of New Mexico and is survived by his wife Lourdes Kirby, daughter Alexandra Kirby Griego and her husband Matt, grandchildren Asher Kirby, Oliver Griego and Kody Griego, and siblings Donald and Michael Kirby and Susan Young.

Christopher Kirby, 38, was arrested and charged in connection with the killing. Charges reported include an open count of murder, aggravated assault with a deadly weapon, and tampering with evidence. Family members described Christopher as having suffered from mental illness and becoming increasingly angry and delusional before the incident. Witnesses say the elder Kirby visited that night to speak with his son; Christopher allegedly pointed pepper spray at his father, then drew a firearm and fired several shots after being asked if he had a gun. Christopher reportedly fled, then called 911 and gave his location, leading to his apprehension.

Anyone who knew Dr. Kirby or observed activity in the Larchmont Drive area that night is asked to share what they know.