The shooter in yesterday's murder/suicide at UCLA maintained a "kill list" of people he held grudges against, and appears to have been using it to kill people before he turned the gun on himself yesterday.

The Los Angeles Times reports that Mainak Sarkar believed some code he had invented had been stolen by Professor William Klug, the victim in yesterday's shooting.

Sarkar had a list of three people -- two professors and one woman -- whom he believed had stolen code from him. Professor Klug and a Minnesota woman were on the list, and the Minnesota woman was found dead as well. After shooting the Minnesota woman, Sarkar drove from Minnesota to California with two semiautomatic handguns, intending to gun down both remaining professors on his list.

The third person is a former UCLA professor who taught him about five years ago or so, while Sarkar was a student at UCLA.

Social media was the place Sarkar turned to vent his frustrations -- at first.

“William Klug, UCLA professor is not the kind of person when you think of a professor. He is a very sick person. I urge every new student coming to UCLA to stay away from this guy,” Sarkar wrote in a now-deleted but still cached blog post on his personal blog. “He made me really sick. Your enemy is my enemy. But your friend can do a lot more harm. Be careful about whom you trust.”

In memory of Professor Klug and the unnamed woman Sarkar murdered, wear orange today.