The Purdue University student accused of killing a classmate pleaded guilty to murder in Tippecanoe County court Thursday.
Police say Cody Cousins, 23, shot and stabbed Andrew Boldt, 21, on Purdue's West Lafayette campus in January.
Boldt and Cousins were both seniors at Purdue, and both were teaching assistants for the same professor.
Cousins will be sentenced Sept. 19.