Swiss should be capitalized; coworker should not be capitalized.
Humans should deal with evil by doing what is opposite of evil, which is good. If evil is thievery, bullying, and lying, we could combat it by giving to others, being kind, and telling the truth.
If a coworker is being electrically shocked, do not touch them, and shut off the power.
IT ALL DEPENDS WHAT THIS COWORKER HAS DONE. IF HE HAS BROKEN THE LAW, THEN YOU SHOULD.. IF IT'S JUST SOME PETTY OFFICE THING, THEN WORK IT OUT BETWEEN YOU.
Yes it should be hyphenated: co-worker.
you should modify the problem
Report it to your boss but tell the boss you want to remain anonymous.
Don't talk about it.
Ignore it completely
Hiring that coworker
If they broke a policy, you need to give them a warning. If they break the policy again, you can fire them.
No, do not give a card for the anniversary of the death of a coworker as it's in poor taste. Although many will have fond memories of their coworker and miss them, most would prefer to just move on.