Can you help me find a place to start with this legal question?

Several years ago a friend of my daughter was arrested for a felony. He was not actually involved in the crime but was present at the scene. He was held overnight then released on bond. He was never charged, never went to court or even had a hearing. The other two involved were charged and went to court and the case was dismissed.
He was 22 at the time.
His record shows the arrest, what it was for and that he spent time in jail. But because he was not charged or brought to court there is no resolution, just this basic info. This is all there when a potential employer does a background check.
Is there any way to get this off his record and if so, where should he start? I have suggested getting a lawyer. Any idea what it would cost to hire and attorney for something like this or even if it is possible to expunge?