Ferguson, Missouri (CNN) -- As the St. Louis suburb of Ferguson calmed Friday after nights of protests over the fatal shooting of an unarmed black teen, the question remains: Where's the police officer who pulled the trigger?

Officer Darren Wilson, 28, shot Michael Brown on August 9. The shooting sparked days of violent protests in Ferguson as residents demanded his arrest.

Separate federal and local investigations are under way, and Wilson -- who has received death threats -- has disappeared from public view.

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Here's what is known about his whereabouts.

Where is he now?

Few outside Wilson's family and authorities know for sure.

Wilson owns a house in a modest neighborhood about 20 miles from Ferguson. He bought the house shortly after he was divorced last year, according to the St. Louis Post-Dispatch.

But several neighbors have told CNN that Wilson left home before his name was released last week.

What are his neighbors saying about his whereabouts?

Not much. Most have shunned reporters' requests for interviews, and some put signs in their yards shooing away journalists.

"We don't know anything ... Pray for Peace," one read, according to the Post-Dispatch.

"We have 2 children. Do not knock!! No comment," another family wrote.

Any trails on social media?

The newspaper reported that Wilson deactivated his social media accounts before his name went public.

The only social media presence for him now is from supporters, who have set up Facebook pages to support and raise money for him.

1. Who was Michael Brown?
2. What happened to him?
3. Was Darren Wilson a cop?
4. Where is Wilson now?
5. Where does he live?
6. Do his neighbors know where he is?
7. How have they handled the publicity?
8. What kind of ongoing investigations are there?
9. How old is Wilson?
10. Why did he shoot Michael Brown?
11. How did local people react to this?
12. What were they hoping to accomplish with the protests?
13. Have any of his neighbors spoken to press?
14. What did they tell CNN?
15. When did Wilson buy the house?
16. When was that?
17. Did he receive death threats?
18. What do the signs in the neighbors yards say?
19. Is Wilson active online?
20. What town was Brown shot in?
1. unarmed black teen
2. Darren Wilson shot Michael Brown
3. Yes
4. Few outside Wilson's family and authorities know for sure.
5. about 20 miles from Ferguson
6. No
7. Most have shunned reporters' requests for interviews, and some put signs in their yards shooing away journalists
8. federal and local investigations
9. 28
10. unknown
11. The shooting sparked days of violent protests
12. his arrest
13. Most have not
14. that Wilson left home
15. shortly after he was divorced
16. unknown
17. Yes
18. We have 2 children. Do not knock
19. no
20. Ferguson