The USC graduate student charged with stabbing a professor to death pleaded not guilty to charges of first degree murder Tuesday.

David Jonathan Brown is accused of murdering psychology professor Bosco Tjan in his lab on campus Friday night.

Brown, 28, wore a blue jumpsuit and did not speak at his arraignment in Los Angeles Superior Court. His public defender did not contest the bail amount, which was set at $2,020,000.

Brown is due back in court on Dec. 19. If convicted of first degree murder, he faces a maximum sentence of 26 years to life in prison, according to the LA County District Attorney's Office.

Updated Dec. 6, 6:33 p.m. PT: This story was updated to add attribution for Brown's sentencing information.

Updated Dec. 6, 7:52 p.m. PT: The headline was updated to clarify that Brown pleaded not guilty to charges of murder.

Reach Staff Reporter Cole Sullivan here and follow him on Twitter here.