WHAT CAN BE DONE?

Reading the newspaper, listening to the news on the radio or tv, it's happening and it is not a good thing.
Police car gets into an accident would be good person runs to help policeman but the creep turns the officer (who already has a spinal injure) not to help but to take his gun. Just what kind of people are out there?
Just the other day a police car was responding to a call of shots fired and while en route a car pulls up next to them and opens fire hitting one officer in the knee and the head. This officer did die later and he was only 27 years old and engaged to be married. Again a life of a good person taken by some creep with a gun.
What can be done? Should the laws for such things be stricter so as to put fear of doing an act of violence into these people no matter if young or old. Sentence the young punks who think they own the streets as adults regardless of age. Isn't it always said "an eye for an eye".
When family members are interviewed, how can they honestly say that they forgive the person who killed their loved one. Not possible.