PARKLAND, Fla. – Here is the timeline of the Marjory Stoneman Douglas High School massacre Wednesday, according to Broward County Sheriff Scott Israel. 

2:19 p.m.

- Uber driver drops off Nikolas Cruz at the school at 5901 NW Pine Island Road in Parkland. 

2:21 p.m.

- Cruz enters the east stairwell with a rifle inside a black soft case. He exits the stairwell after pulling the rifle out of the case.

2:21:33 p.m.

- Cruz begins shooting at classrooms 1215, 1216 and 1214.

- Cruz returns to classrooms 1216 and 1215, and then to classroom 1213.

- Cruz takes the west stairwell to the second floor. 

- Cruz shoots one victim in classroom 1234. 

2:27 p.m.

- Cruz takes the east stairwell to the third floor. 

- Cruz drops his rifle and backpack and runs down the stairs. 

- Cruz exits building 12 and runs toward the tennis courts. 

INTERACTIVE MAP OF SCHOOL

'Blending in with the crowd'

2:29 p.m.

- Cruz takes a southbound turn, crosses fields and runs west along with others who are fleeing and tries to mix in with the group running away. 

2:50 p.m.

- Cruz arrives at the Walmart at 6001 Coral Ridge Drive, buys a drink at the Subway inside and leaves on foot.

3:01 p.m. 

- Cruz arrives at the McDonald's at 5741 Coral Ridge Drive, sits down for a short time and leaves on foot. 

3:41 p.m.

- A Coconut Creek Police Department officer detains Cruz at 4700 Wyndham Lakes Drive. He is positively identified and taken into custody.