The Harvard School of Public Health recently completed a study on homicide rates in 26 countries including the USA. In the study, it was determined that the countries with the highest home ownership of guns had the highest homicide rate increase. In addition, the study looked at USA states that had high home ownership and found that the homicide rate was dramatically higher than the states with a smaller percentage of gun ownership.
Poverty certainly has a strong impact on crime. Desperation and depression caused by financial strain will cause people to do terrible things. The loss of jobs and lack of prospects for jobs can also create the atmosphere for increase in the homicide statistics.