May I ask where you are getting your information? Unless this has personally happened to you or a loved one then this is absolutely fear mongering. I have been to PV twice in the last year and have a friend who lives near Zona Romantica. I walked alone day and night and had zero issue and always felt safe. I have encountered police and have had no confrontation or hostility. I agree with the other person who stated that they felt safer walking alone in PV than they do in certain American cities. As others have said here, I am not saying things like this never happen (just as shootings, theft, crime and corruption also happen in American cities) but insinuating that it is the norm is completely inaccurate.