Stu­dent ar­rested in death of prof

The Denver Post - - NEWS -

los an­ge­les» A grad­u­ate stu­dent ar­rested on sus­pi­cion of stab­bing to death the pro­fes­sor who over­saw his work at the Univer­sity of South­ern California was be­ing held on $1 mil­lion bail Satur­day as their shocked col­leagues be­gan pro­cess­ing the stun­ning news.

David Jonathan Brown, a 28-year-old brain and cog­ni­tive sci­ence stu­dent, was ar­rested in con­nec­tion with the Fri­day af­ter­noon at­tack in the heart of the Los An­ge­les cam­pus. His men­tor, Bosco Tjan, was pro­nounced dead at the scene.

Brown was among just five stu­dents who worked in Tjan’s lab that stud­ied vi­sion loss. In a bi­og­ra­phy page about the stu­dents, Brown’s is the only one with­out a de­tailed de­scrip­tion or pho­to­graph.

Tjan was killed in­side the See­ley G. Mudd build­ing where he was run­ning the lab. Brown was ar­rested with­out in­ci­dent al­most im­me­di­ately after­ward, po­lice said, adding that the killing was tar­geted.

Kilho Shin, also a brain and cog­ni­tive sci­ence grad­u­ate stu­dent who worked in Tjan’s lab, said Satur­day that Brown was a quiet stu­dent and seemed sat­is­fied with Tjan’s over­sight.

“I don’t know what ex­actly hap­pened be­tween them. But as far as I know, Bosco likes David’s work and David also seemed to be sat­is­fied with his su­per­vis­ing,” Shin said. “Their con­ver­sa­tion on re­search was healthy and con­struc­tive.”

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