UCLA’s campus was put on lockdown this past Wednesday as reports of a shooter on campus began to spread following three gunshots. Two hours later, Police Chief Charlie Beck declared the University safe after finding both the victim and suspected shooter in the school engineering office.

Reports now confirm that the victim was UCLA mechanical engineering professor, William S. Klug, and the suspected shooter was Mainak Sarka, a former student of his, according to USA Today. While a motive hasn’t been confirmed, authorities said they’ll investigate the two men’s past “longer-standing” poor relationship as teacher and student.

The shooting came a week before finals, which is widely known to be one of the most stressful times of the semester for students. The weapon was found at the scene and Beck wouldn’t confirm if a suicide note was present.

After Klug was identified, many that knew him came forward to offer kind words in his memory.

“Bill was an absolutely wonderful man, just the nicest guy you would ever want to meet,” said UCLA professor Alan Garfinkel to USA Today. “Devoted family man, superb mentor and teacher to so many students. He was my close colleague and friend. Our research together was to build a computer model of the heart, a 50 million variable ‘virtual heart’ that could be used to test drugs.”

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