Ma Jiajue (simplified Chinese: 马加爵; traditional Chinese: 馬加爵; pinyin: Mǎ Jiājué) (4 May 1981-17 June 2004) was a Chinese biochemistry major at Yunnan University in China, who murdered his four university roommates in February 2004. Their bodies were found in a dormitory closet at the university. He was convicted of the quadruple murder, and was executed.