He was accused of 'assault'. = He was charged with 'assault'. = 'Assault' charges were brought against him.
He came 'under assault' for his unusual beliefs. [=he was severely criticized for his unusual beliefs]
He was found guilty of 'sexual assault'. [=the crime of touching someone in an unwanted sexual way]
(..) I mean, it had a lot of interest for me. No real... dead spots. You know what I mean? We were lucky to get a murder case. I figured us for an assault or burglary. Boy, they can be the dullest! - Hey, is that the Woolworth Building? - That's right. Isn't that funny? I've lived here all my life. (..)1957 12 Angry Men