He was a member of the Armed Forces Revolutionary Council (AFRC) which ruled Ghana for a few months in 1979.
Tasiri was with the Fifth Infantry Battalion at the time of the 4 June 1979 coup and became a member of the government.
Tasiri is reported to be one of the key persons who initiated the action of 4 June 1979 which overthrew the Supreme Military Council (SMC) military government led by Lt. General Fred Akuffo.
[3] He was sent to the United States for studies by the Limann government after they handed over power in September 1979.
While testifying before the National Reconciliation Commission in 2003, he reiterated a group apology offered by some of the members of the AFRC for atrocities committed during their rule.