Police were abrupt

Hi I care for my adult son with autism and schizophrenia, a police officer came and asked me a lot of rapid questions as my son knocked twice at window and doors , of a nearby house he always says a phrase, Jesus died for our sins then leaves. 

Since last year his symptoms have decreased but going out he will likely still do this, many are understanding but this person called police. I felt almost intimidated and they didn't even ask to speak to my son. I opened his door and spoke to him.  I explained he is waiting for a next clinic appointment anytime now.  They even asked if we have a social worker, I wasn't happy that they were abrupt and didn't give me time to think very well.  If they spoke to my son that way he would have clammed up or got confused/upset. I offered to apologise the person who complained but they said its not necessary.  

I felt there was no empathy or respect, and I was only asked my surname not first.