In interesting video which examines the correlation, or lack there of, between gun prevalence and murder rate. It goes into some detail to compare various countries around the world as well as comparing U.S. Cities with high and low murder rates and high and low gun ownership rates.
WARNING! If you are one who believes that high gun ownership leads to murders and strict gun control laws lead to less murders, this video will disappoint and frustrate you.
https://youtu.be/pELwCqz2JfE