he should talk with attorney.

Family assult has several kinds, in the worse case, you need not show in the court, the city prosecutor will accuse your BF directly, and use the policeman's attestment. Your photo or your appearence will be additional support. But most important is your words and your BF's attitude.

Since you have big surface damage already, if policeman had already took the photoes. You may need pay more to your attorney, since the case is little tough.

But remember, this is America, money talks! Hire a white attorney not chinese attorney. Let your BF talk with the attorney about the story you two believe is true.

A lie will become truth, if it is repeated thousand times. In the end, you two will believe that is true.

Do not deal with policeman or court by yourselves. That will make case worse and worse!

This is a big lesson to you two. Hope both of you will learn something! Good Luck to you!