LAPD handled it horribly, but that does not justify him in any way. Funny how you hear stories on the news about a disgruntled worker killing their boss and nobody rushes to their defense. But because its cops he's killing...
The moment you kill an unarmed, defenseless human being...it makes you the complete opposite of a human being. Maybe your motives are notable, but at the end of the day you're just a despicable worm that never should have been born.