Riario promoted several further plots against the Medici, but they all failed. In 1488 he was the last of the main Pazzi conspirators left alive, and was himself assassinated in a conspiracy led by two members of the Orsi family from Forlì, supposedly over a financial dispute. On 14 April, Checco and Ludovico Orsi entered the government palace, and one of them attacked Riario with a sword. Despite the presence of the Count's guards, a total of nine assassins slashed Riario to death, eventually flinging his corpse into a local piazza, where a crowd gathered in support of the assassins. The assassins then proceeded to loot the palace.