Passage: He headed the self-defense of the sub-district Getashen-Martunashen from September 1990 until May 1991 against Azerbaijani armed forces units and police detachments (OMON). Krpeyan was killed on 30 April 1991 in Getashen during the Operation Ring. He received the highest title in Armenia, the National Hero of Armenia award in 1996. He was buried in Areg, which has been renamed after the hero – Tatul. A tuffaceous monument has been erected in memory of Tatul. The sculptor of the monument is Tariel Hakobian.

Question: When did Krpeyan die?
30 April 1991