has gone crazy
Dmitri est devenu fou.
Dmitri has gone mad.
Terry en a mangé une quand on était petits et il est devenu fou.
Terry ate one when we were little and he went crazy.
— Zootopie (2016)
Un colonel est devenu fou, je dois le tuer.
A colonel has gone mad; I must kill him.
— Apocalypse Now (1979)
Sami est devenu fou.
Sami has gone crazy.