I have never heard "Killumbus". I live in the city-- never had any problems with crime. It certainly is safer than many places out in the country such as Pataskala. What I mean, actually is that the rural areas are not rife with violent crime, but they do have a higher per capita rate of break ins due to stretched police forces. Also, they do have a higher auto accident rate. Those county roads can be quite dangerous! But, like anywhere you have to do your research. There are some parts of the city that are perfectly safe and some that are, well, a lot less so (I don't really like the term "trash" though).