The man was mentally disturbed.

这个人精神错乱了。

youdao

Brother Sharp is said to appear mentally disturbed when approached on the street.

据在路上接触过这位“夏普哥”的人说，他有精神失常的表现。

youdao

Dr Manette had been mentally disturbed by his long years alone in prison and his hair had turned white.

由于多年被单独关在牢房里，曼奈特医生精神失常了，头发也变白了。

youdao

At 13 she fell ill, and remained an invalid until she died, mentally disturbed, in her mid-20s.

ECONOMIST: Art history

Yes, criminals and the mentally disturbed will always find a way to access legal or illegal guns.

FORBES: Gun Control--The Only Way To Disarm Is To Disarm

But that trend may be heading for a U-turn in 2013 after last year's shooting rampages by two mentally disturbed gunmen.

NPR: After Shootings, States Rethink Mental Health Cuts