Cars broken down on the side of any relatively busy road are a matter of public safety and should be addressed by any police that goes by. They don't need to get out and help, but they should check the situation. That takes nothing more than them asking a question.
If he was so busy taking care of all of the murders that happen in UA, why did he sit there and watch him? Seriously, I'd be pissed at anyone who just sat there and watch me work on my car after I broke down on the way to work. WTF are you doing?
Sounds like that particular cop is a waste of taxpayer money. There's not a need or logical reason to defend every cop, some aren't worthy of the job. Don't be an apologist for bad cops.