Place this clip as the closing reply after the accusation in your edit, then follow it with the Carlos Alberto laugh sound button for the reaction. For a politics roundup, lead in with the faz o l vinheta sound button before cutting straight to this answer.
इस साउंड के बारे में
The clip is Lula speaking the Portuguese phrase 'Eu não sabia', meaning I didn't know, delivered in his recognisable voice over about four seconds. It lands as a deadpan denial, funny and a little evasive, the kind of line listeners use when an excuse sounds too convenient to believe at face value at all.