Constantinos Costas Lyrintzis, 36, was one of three San Diego State University professors killed on August 15, 1996, during a faculty meeting to defend a student’s master’s thesis. The student, Frederick Martin Davidson, had concealed a 9mm semiautomatic handgun and five 15-round spare magazines in a first-aid kit in the room. As the defense began Davidson fired more than 20 rounds, pausing to reload, and methodically shot his faculty adviser Chen Liang and two other professors, including Lyrintzis; he chased and killed the third professor, D. Preston Lowrey III, in an adjoining office while allowing students present to escape.

Davidson was arrested at the scene and held at the San Diego County Jail. Prosecutors initially sought the death penalty; families including Lyrintzis’ wife Deana later accepted a plea that resulted in three consecutive life sentences without the possibility of parole. Family members have since opposed efforts to commute Davidson’s sentence and have campaigned against clemency.

If anyone knew Costas Lyrintzis or has information about the day of the attack, please share what you remember.