Battery

I am not sure I understand your question.  However, if you are asking how and when you will know if someone who threw a beer and is charged with battery, then I may be able to help answer the question.  The person who threw the beer will know he/she has been charged if he/she gets a notice to appear in court (or arrested, if an arrest warrant is issued).  The arrest is less likely than a notice to appear if it has been a while since the incident occurred. How long it will be before you know is not as easy to answer.  That could depend on a number of factors.  But, generally, I would think if charges are filed, I would expect you to be notified within a couple of weeks.  That is not a guarantee.  Occasionally, especially around a busy time such as a holiday season, the process may get slowed down.  If you don't get a notice to appear, or arrested, after a couple of months, it is unlikely that you will be.  (Again, that is not a guarantee.)