Conversation so far:
How did Amílcar Cabral die?
A disgruntled former PAIGC rival Inocêncio Kani, together with another member of PAIGC, shot and killed Amílcar Cabral on 20 January 1973 in Conakry.
Was Amílcar Cabral's murder premeditated?
Yes.

Question: Why was he killed?
Self-contained rewrite: Why was Amílcar Cabral killed?