what will happen after police show up?

My friend came over and helped me to cut a pipe. HOA was on the meeting. They asked us to stop because of the noise. My friend didn't agree. Then property manager knocked my door and wanted to get in. My friend pushed him out. They maybe have some 肢体碰撞 Between two of them. And then that property manager called police. Police came and made report. asked my friend name, birthday, phone number. Police said they took both side of stories and names.
What will happen next? what can I do to protect my friend?
Thanks!