In 1960 he was arrested and sentenced to death in 1961 for being a member of a pro-Soviet group, led by Rear Admiral Teme Sejko, that had been planning a coup d'état against Enver Hoxha.
After World War II he became chairman of the Party of Labour committee of Elbasan District and Albania's delegate at Comecon.
[1] In July 1960 he was arrested by the Sigurimi, Albania's secret police, for being part of an alleged joint Greek-Yugoslav-Italian-US Sixth Fleet counterrevolutionary plot to overthrow the Albanian government.
The other defendants included ex-editor-in-chief of Zëri i Popullit Taho Sejko and Liri Belishova, chairwoman of the Central Committee of the Party of Labour of Albania.
Tahir Demi was sentenced to death and executed after the trial along with three other high-ranking members of the Albanian army and the Party of Labour of Albania, Teme Sejko, Abdyl Resuli and Hajri Mane on 31 May 1961.