Which of the following are correct:
1-The policemen guided him into the front seat of their car with the blue and red flashing lights.
2-The policemen guided him into the front seat of their car, with the blue and red flashing lights.
3-He was staring at his wife with the long blonde hair.
4-He was staring at his wife with her long blonde hair.
5-He was staring at his wife with long blonde hair.
I don't think '2' works. The comma does not make sense to me. I prefer '3' to '4' and '5', although it seems to me that 'who had long blonde hair' would be much better.
The first sentence says that the policemen guided the individual into the front seat of their car and that the car's red and blue lights were flashing. The comma changes the meaning. (To what, I don't know.)
The third sentence suggests that he has more than one wife. (Maybe he does.) In fact, the "with" in those sentences (3-5) makes them problematic to me. (Is the hair supposed to be participating in the activity?)
He was looking at his wife and admiring her long blonde hair.
(Note that staring is considerate rude.)