Lyndon Johnson actually said...

I ask every American to respect the law, and to respect also the men who are pledged to its enforcement.

And of those who wear the badge, I ask an equal respect both for the law and for the rights of the people they are sworn to protect.

Your courage and your self-sacrifice have provided us with a glowing example of what I believe is the best of American manhood.

I ask not blind obedience, but enlightened obedience.