Answer the questions at the end based on the text.

CHICAGO, Illinois (CNN) -- A man suspected of murdering a doctor in Chicago, Illinois, is trying to skirt the U.S. justice system by fleeing to the French island territory of St. Martin, according to prosecutors. 

Dr. David Cornbleet, a dermatologist, was murdered in his Chicago office in October, 2006. 

"He's doing everything possible to protect himself," said Bernie Murray, chief of criminal prosecution for the Cook County State's Attorney's Office in Illinois. "At the end of the day, he's making a mockery of both French law and United States law." 

After fleeing to St. Martin, Hans Peterson, 29, turned himself in to French authorities and allegedly confessed to murdering Dr. David Cornbleet in October, 2006. Jon Cornbleet, Dr. Cornbleet's son, said he has seen a four-page confession in which Peterson admits to attacking and killing David Cornbleet in his Chicago office. 

Despite the alleged confession, Peterson is beyond the reach of U.S. law enforcement. As a French national on French soil, he cannot be sent to the United States for trial, according to a 2002 extradition treaty between the two countries. The United States, by contrast, is allowed to extradite U.S. citizens to France, under the treaty. 

U.S. Sens. Barack Obama and Dick Durbin, both of Illinois, sent letters to Secretary of State Condoleezza Rice asking for help extraditing Peterson. In response to the senators, the State Department wrote it "will continue to make every effort with the government of France to see that justice is served in this case." 

Sens. Durbin and Obama also wrote the French government requesting extradition. 

1. Who was murdered?
2. Where?
3. What kind of doctor is he?
4. When did this occur?
5. Was he caught?
6. Where is he?
7. Who is the suspect?
8. Is he French?
9. Will they send him to the U.S.?
10. Why not?
11. What does the treaty say?
12. Does this work both ways?
13. Did he do it?
14. How do they know?
15. To who?
16. What do experts think about this?
17. Who said that?
18. What does he do?
19. Is there anything that can be done?
20. Is anyone else trying to help?
21. Who?

Numbered answers:
1. Dr. David Cornbleet
2. in his Chicago office
3. dermatologist
4. October, 2006
5. No
6. fleeing to St. Martin
7. Hans Peterson
8. Yes
9. No
10. 2002 extradition treaty
11. French national on French soil, he cannot be sent to the United States for trial
12. No
13. Yes
14. allegedly confessed
15. French authorities
16. he's making a mockery of both French law and United States law
17. Bernie Murray
18. chief of criminal prosecution for the Cook County State's Attorney's Office
19. the State Department wrote it "will continue to make every effort
20. Yes
21. U.S. Sens. Barack Obama and Dick Durbin