Mainak Sarkar left behind a 'Kill List' that led investigators to another victim.
The gunman who opened fire in a murder-suicide at UCLA has been identified as 38 year old Indian-origin former student f UCLA - Mainak Sarkar.
Sarkar spent years in academia studying engineering.
According to Sarkar's LinkedIn page, before enrolling for a PhD at UCLA, Sarkar had earned an undergraduate degree in aerospace engineering from the Indian Institute of Technology (IIT) in Kharagpur and a master’s degree from Stanford University.
At the time of the killings, Sarkar was living in Minnesota.
Sarkar has left behind a trail of evidence that led investigators to another victim.
Police found a note at gunman Mainak Sarkar's Minnesota home with an ominous title, Los Angeles police Chief Charlie Beck told reporters.
"Kill list," it said, spelling out the names of three people, according to Beck.
Sarkar also had multiple magazines of ammunition and multiple loose rounds of ammunition.
"He was prepared to engage multiple victims," Los Angeles Police Chief Charlie Beck.
So far, authorities have only identified one of them: William S. Klug, the UCLA professor Sarkar killed.
In his doctoral dissertation, submitted in 2013, Sarkar expressed gratitude to Prof. Klug for his help and support.
According to the Los Angeles Times, Sarkar wrote in his note - “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 ... 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.”
There’s a woman's name also on the list, Beck said.
Police in Brooklyn Park, Minnesota, found her dead Thursday.
She had a gunshot wound and had apparently been killed before the UCLA shooting, Deputy Police Chief Mark Bruley told reporters.
Police declined to release further details about that victim or why she was targeted.
The third person Sarkar intended to target was another professor at UCLA, Beck said.
That faculty member was off-campus Wednesday and was unharmed, the police chief said.
"Everybody tries to look for a reason for this. Well, first of all, there is no good reason for this," Beck told the station. "This is a mental issue, mental derangement, but it was tied to a dispute over intellectual property," Beck said.
Sarkar felt the professor he killed had released information "that harmed him," Beck told KTLA.