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Input: Brown killed his mentor  Siaufung "Bosco" Tjan  on Dec. 2  2016  inside the University of Southern California building where the 50-year-old psychology professor ran an intensive lab that studied vision loss  authorities said.
 Tjan's widow  spoke during the hearing in Los Angeles Superior Court.
" He  was not a soldier in a war zone or policeman in a dangerous street.  He  was murdered in  his  research lab " Carissa Pang said  according to City News Service.
"I feel helpless when  my son  asked me why  his  father was killed "  she  said.
 She  said  she  told  him  that the killer was "having bad thoughts."
Brown's family "gives their condolences and hopes that you find some solace " defense attorney Steve Schoenfield told  her .
Tjan's family will be notified of any changes in where Brown is housed and what treatment he receives  Judge Leslie A. Swain told Pang.

USC student could face life in hospital in professor's death