Far from doubting your daughter's side of the story, but could it actually be that she went through a red light, though - how would you know if you weren't there? A language-related misunderstanding could have also played a significant part. That aside and trusting what your daughter is saying, I can tell you that I've been coming to Bosnia on a weekly basis (work) for quite a few months now and had several friends coming over visiting from Britain/Italy/Poland (mostly driving from other parts of the region) and nobody ever reported even the slightest attempt of bribery from the local forces. Incidentally, I also got stopped a couple of times and always found police officers extremely friendly, once I was unable to get myself understood in English (which is my main language) and switched to Polish, a rather funny situation as they could obviously get some words and they asked whereabouts in Russia am I from (my Mrs, from Poland, was clearly not impressed)
On the whole, not an issue as far as I've experienced so far.
G