Widow of Slain UCLA Professor Calls Husband's Death 'Indescribable Loss'

— -- The widow of the UCLA professor shot and killed Wednesday by a man believed to be a former student said that her husband's death is an "indescribable loss."

"During this extremely difficult time for our family, we are grateful for the tremendous outpouring of support," William Klug's widow, Mary Elise Klug, said in a statement released by the UCLA.

"This is an indescribable loss. Bill was so much more than my soulmate. I will miss him every day for the rest of my life. Knowing that so many others share our family’s sorrow has provided a measure of comfort."

Klug joined the UCLA faculty in 2003 and headed a research group that studied theoretical and computational biomechanics. The school said he is survived by his wife and their two children.

The LAPD identified the gunman as former UCLA student Mainak Sarkar, who turned the gun on himself after killing William Klug.

Police said they believe Klug was one of Sarkar's teachers. UCLA confirmed that Sarkar was a graduate student there from the fall of 2007 until the summer of 2013, when he received a Ph.D. in mechanical engineering from the school.

LAP Chief Charlie Beck said investigators are focusing on Sarkar's grades and what was described as a longer-standing poor relationship between the two men.

Beck also told reporters Thursday that he was aware of a social media post that Sarkar allegedly wrote to bash Klug. But Beck said that the posts he has reviewed "contained no death threats. There [was] some harsh language" but "certainly nothing that would be considered homicidal."