Read the text and answer the questions.

(CNN) -- A former Utah policeman is a suspect in at least three of Monday's four rush-hour shootings near Dallas, Texas, including one of two fatal attacks, police said Tuesday. 

CNN affiliate KSL in Salt Lake City, Utah, provided this file photo of the Dallas suspect, Brian Smith. 

The suspect, Brian Smith, tried to commit suicide after the Monday-evening shootings and was in a hospital in serious condition, Dallas police detective Lt. Craig Miller said. 

Police used ballistic tests to link Smith, a Utah state police officer for 12 years, to the shootings in which one driver was killed, one was injured by shattered glass and one escaped uninjured, Dallas police detective Lt. Craig Miller said. 

Miller said it is unclear if Smith was involved in the other fatal shooting, which was the first attack of the evening. 

Four motorists were attacked along a three-mile stretch near and on the LBJ Freeway, about 10 miles northeast of downtown Dallas, on Monday evening, police said. 

The first attack, which happened in Garland, Texas, about 5:41 p.m., killed Jorge Lopez. Garland police said Lopez, 20, was sitting in his Nissan at a traffic light when a man in a pickup pulled alongside him and fired shots into his car, killing him. A few minutes after the Garland shooting and two miles away on LBJ Freeway, a gunman fired at two tractor-trailers. 

While one driver escaped injuries, William Scott Miller, 42, of Frankfort, Kentucky, was shot to death behind the wheel of a United Van Lines truck, police said. 

1. Who was killed driving in a United Van Lines truck?
2. Where was near the site of four rush-hour shootings?
3. In what state were they?
4. Who was the suspect?
5. What was Smiths' profession?
6. What did he try to do to himself?
7. How many drivers were attacked on the LBJ?
8. When was that?
9. What did police use to link Smith to the shootings?
10. Where was the first incident?
11. Who died in it?
12. How old was he?
13. What was he doing?
14. Where is the suspect now?
15. How long had he been an officer?
16. In which state?
17. What happened several minutes after the Garland shooting?
18. How old was William Scott Miller?
19. Where was he from?
20. What condition is Smith in?

Numbered answers:
1. William Scott Miller
2. the LBJ Freeway
3. Texas
4. Brian Smith
5. policeman
6. commit suicide
7. Four
8. Monday
9. ballistic tests
10. Garland, Texas
11. Jorge Lopez
12. 20
13. sitting  at a traffic light
14. in a hospital
15. 12 years
16. Utah
17. a gunman fired at two tractor-trailers
18. 42
19. Frankfort, Kentucky
20. he died