Simple past tense and past participle of aid and abet.
Aided-and-abetted Sentence Examples
But the hostility of Alexius, aided and abetted by the jealousy of Raymund of Toulouse, was almost equally fatal.
In this manner he gained the favour of Nero, whom he aided and abetted in his vices and cr"elties.
He subsequently organized the expedition which rescued all the Irish military political prisoners from the 'Western Australia convict establishments (1876), and he aided and abetted the American propaganda in favour of Irish nationalism.
The collapse of the former Yugoslavia has been aided and abetted by the various western powers using incredibly cynical maneuvers.