Really? Maybe you did not look. Took me less than a minute:
Comparisons of crime in OECD countries.
Out of 36 countries, all of them more or less developed, US has third highest murder rate (after Mexico and Estonia) and fourth highest rape rate. US rates of theft, robbery and burglary are between 8th and 13th (I was shocked by Belgium here), and it is right in the middle in assaults.
All in all, compared to the rest of developed world US seems to be a pretty violent place.
Note that England, where not only guns are effectively outlawed, but also police do not carry guns except on specific missions, has rather low murder rate (about 1/3 from the bottom), but is in top 8 in every other category. Looks like maybe police ARE the ones who should carry guns