Sarkar attended UCLA's school of engineering from the fall of 2007 to the summer 2013, graduating with his PhD degree.
Professor William Scott Klug joined the UCLA faculty in 2003, heading a biomechanics research group, that Sarkar was also a part of.
Klug was married with two children and was described by his students as humble and approachable.
Ashley Hasti and Mainak Sarkar were married in 2011 and split a year later.
Hasti studied medicine at the University of Minnesota Medical School.
In his blog titled Long Dark Tunnel, Sarkar wrote: "My name is Mainak Sarkar. I was this guy's (Professor Klug's) PhD student. We had personal differences. He cleverly stole all my codes and gave it another student. I urge every UCLA student to stay away from this guy."
4 Jun 2016
California Shooting: Gunman's 'kill list' found
On 1st June, 2016, there occurred a murder-suicide at the engineering building of University of California, Los Angeles.
The gunman committed suicide after killing an Associate Professor of Mechanical and Aerospace Engineering.
A note at the scene led the investigators to Sarkar's house, where they discovered a 'kill list'.
It named two UCLA professors and one young woman, who was later found dead.
Do you know?
Mainak Sarkar's cat
In the note that was discovered by the police at the scene of the crime, Sarkar asked the authorities to check on his cat back home in Minnesota.