Looking at this from a calm perspective -
This dad is embarrassed because he has done wrong without realising it, so he over-reacts as a consequence.
Human nature dictates that we don't want to be in the wrong, so if we can make someone else in the wrong, it deflects the responsibility for being responsible for the conflict, and that is what this man has done here.
The correct response is - my apologies officer, I didn't realise this was an offence, I understand that you need to take the flowers, and I will explain to my children that I have made a mistake, it is not their fault and they are not in trouble with you, and neither am I.
His incorrect reaction - although understandable for reasons explained - is to make the officer the villain, and to underline his sense of self-righteousness (deflection of blame again) by insulting and demeaning her - "I pay your wages, and you should be catching criminals ..." - the standard 'defence'.
As the officer points out, she also pays taxes, possible more than he does, and what she didn't point out, but could have done, is that she had caught a criminal - him!
The notion that whatever offence you are being spoken to about is not as serious as a rape or a murder is no defence whatsoever. The police don't ignore one offence they can see because other more serious offenses outside their sight are going on - that is fatuous as an argument.
The man behaved badly by blowing everything up into a major row, and filming his children for his own self-justification, instead of talking to them calmly about what had happened, and why.
You can never stop people making fools of themselves, and because everyone is a Martin Scorsese with cameras on phones, they can make fools of themselves to millions of strangers, who will scoff at them, like I am doing now.