Whats wrong with this country and its law system?

i live in washington state, and yesterday a 28yo shot and killed six people including a deputy sheriff, and wounded a state patrol officer. now why do we waste our time, and money giving this a trial when we know he did it? he should be executed on the spot. why our there so many bleeding heart liberals who oppose capitol punsihment? are they that stupid? i mean come on people wake up! as far as i am concerned all murderers should be executed. this pisses me off! this country is going downhill fast. so all those liberals out there, need to wake up, its because of them that this country is ruined.