What happens to the shares when the public company like Facebook shutdown?

[Respectedbreakfast795]

I've several questions:

1. What happens to the shares and money when the public company shutdown?

2. Why Sahara chief Subrata Roy arrested? I read many articles but still confused, what he did wrong?

3. Let's say I invested some money in Facebook (just for example) and Facebook shutdown, what happens to my investment? Can I get it back?

4. Angel investors invest in new startups but what if the startup lose all money and fail to build the company? He/She gets sued? All his/her property goes to angel investor?

5. Let's say I started a company and then my company goes public. But after some years I sell all my shares then I'm still the company owner? Or get fired by other investors? Please explain.


Thank you guys!