The government, meanwhile, is anxious to apply the only pressure it believes Mr Savimbi understands: force.
Mr Savimbi died as he lived, a despoiler with a gun in his hands.
In 1991, a peace deal led to an election which, despite American efforts, Mr Savimbi lost.
During the cold war, Mr Savimbi was hailed in Washington as a freedom-fighter, and given weapons.
For most of the rest of his life, Mr Savimbi lived in the bush with his guerrillas.
Officials and the state-controlled media take every opportunity to denounce Mr Savimbi as a terrorist and war criminal.
However, it is most unlikely that the government will again agree to negotiate with the tricky Mr Savimbi.
They have an armoury of weapons given to Mr Savimbi by the Americans and South Africans in the 1980s.
The clipped topiary bushes in front of Mr Savimbi's house are still immaculate.
Mr Dembo, 57, is from northern Angola and unlike most Unita fighters is not from Savimbi's Ovimbundo ethnic group, reports AP.
Without surveillance equipment from America and its ally, Israel, the Angolan army could probably not have tracked down and killed Mr Savimbi.
ECONOMIST: This is Angola's best chance for peace for a decade
Savimbi formed Unita after failing to find common ground with other nationalist movements, notably the Movement for the Liberation of Angola (MPLA).
For his part, Mr Savimbi is employing a brutal new tactic: forcing people into towns, surrounding them and cutting off food supplies.
Following the death of Savimbi the army halted offensives on 13 March.
Savimbi's first chance of power came with the end of Portuguese colonialism.
Mr Savimbi has failed to implement the accord in two major ways.
Both Mr Savimbi and Mr dos Santos have entrenched their own positions.
The Americans ditched Mr Savimbi, and started coddling Mr dos Santos, chiefly because huge deposits of oil had been found off the Angolan coast.
ECONOMIST: This is Angola's best chance for peace for a decade
The government's greatest fear is that Mr Savimbi is now the focal point for an army of losers from other countries in the region.
Albeit with the admirable aim of curbing communism, America helped to create Mr Savimbi, and so bears some moral responsibility for clearing up after him.
ECONOMIST: This is Angola's best chance for peace for a decade
Mr Savimbi remains hunkered down in the central highlands, around the towns of Nharea, Mungo, Andulo and Bailundo, the symbolic capital of his Ovimbundu people.
Rebel radio communications, supplied by the Americans when Mr Savimbi was their ally, are intercepted, and that information too gets through to the Angolan government.
Mr Savimbi's popularity waned, however, as his tactics grew more vicious.
Jonas Malheiro Savimbi was born in 1934, into a proud family.
Internationally, the attempts to marginalise Mr Savimbi have done less well.
Mr Savimbi's second big breach of the agreement is his refusal to leave the central highlands to take up his position as opposition leader in Luanda.
With the dry season well under way, there are fears that Angola's official army will see international condemnation of Mr Savimbi as an invitation to pounce.
Mr Savimbi's base is among the country's biggest group, the Ovimbundu, whose consent will be needed by any government that hopes to bring stability to Angola.
In 1994, when Mr Savimbi was on the point of possible capture, the politicians signed a peace agreement and ordered the soldiers to halt their advance.
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