Alberto Fujimori, the former Peruvian president whose decadelong presidency began with triumphs righting Peru’s economy and defeating a brutal insurgency only to end in a disgrace of autocratic excess that sent him to prison, has died. He was 86. Fujimori, who governed with an increasingly authoritarian hand in 1990-2000, was pardoned in December from his convictions for corruption and responsibility for the murder of 25 people.