What's your argument here ? Police brutality is ok because US police officers are more prone to being killed ? By now there are thousands of videos clearly showing people not resisting, sometimes not even participating in any crime, being beaten and/or killed by the police, it's not normal and no one should defend that.
Gun violence in the US is the symptom of very deep problems, you can't consider it just by itself while disregarding the societal issues being it.