More than 100 people gathered yesterday evening at National Taiwan University (NTU) in memory of former Carnegie Mellon University (CMU) assistant professor Chen Wen-cheng (陳文成), whose death 30 years ago remains a mystery to this day.

Chen, a graduate of NTU’s Department of Mathematics, went to study in the US and later became an assistant professor at CMU’s Department of Statistics.

He was called by the Taiwan Garrison Command — a military state security agency during the Martial Law era — for interrogation on July 2, 1981, when he returned to Taiwan to visit his family, because of his support for the pro-democracy movement.