Even I have to confront trespassers and pseudo-burglars (people stealing fruit) on my property, sometimes on a weekly basis. There are usually at least 2 trespassers every time this happens, and I'm typically alone. On several occasions the trespassers refused to heed my command to leave and became aggressive. Even after calling the police countless times, they can't do much, and for the most part I am left to my own devices to deal with it.
I can understand a female police officer not wanting to confront 2 males, but considering what the police leave me to deal with on my own, she has to.
Also, even if she did not want to confront the robbers, why couldn't she have just followed them in her patrol car?