I am surprised it took as long as CMDad’s post above for anyone to mention YOU call the police FIRST. My thinking is that they can have an interview with you, maybe determine how likely you are to being someone who breaks into cars at night (do grant this man likely does have some justification in having his knickers in a twist about breakins) and have them contact him. they could just maybe talk to him and likely allay his concern about you specifically.
Other than that, the combat forum has had MANY threads with absolutely golden posts in the realm of real fighting, that is all the variables involved with a non sporting altercation. Here’s some:
these first 2 are likely all you need to read, all lot of them got rehashed in the thread later.