We are expected to make mistakes, after all we are human. The key is not to make those same mistakes over and over again. There are at least 10 practically-guaranteed ways to shorten your life and terminate your career as a law enforcement officer. They won't result in fatal consequences every time. If you practice them - simple, dumb luck will prevent that.
All alarms are false.
Somebody has already searched that guy. He's only a drunk. I know that guy, he won't hurt you. By making these assumptions, you can save a lot of mental wear and tear, reduce your stress. Assume whatever and whenever you want.