9:30 AM
Adam Idaho and Richard Burns are seen by multiple witnesses walking towards the school on Acadia Drive, carrying duffle bags. They are later seen exiting the school via the main entrance, no duffle bags are seen. CCTV footage spots both Idaho and Burns planting propane bombs in two different locations.
9:45 AM,
Adam Idaho and Richard Burns fire upon Omar Jamison, Tyler Madison and Penny Watt at point blank range in the west field,
9:48 AM,
CCTV footage spotted the two entering through the main entrance. They are seen entering the main office, firing upon Angela Grataeu, killing her instantly.
9:54 AM,
CCTV once again spots Adam Idaho and Richard Burns exit the main office, and start walking around in the hallways.
9:58 AM
Burns is seen on CCTV shooting down Bennett Courier in the chest outside of the library, Bennett Courier died instantly.
10:07 AM
Idaho and Burns are seen on the CCTV at the library entrance, taunting students. Burns is seen shooting a computer monitor. Idaho jumps onto a table and starts yelling at students. Burns sits in a desk chair and begins speaking to students, Jamie Poratio and Isaiah Jordan, Burns shoots those students point blank with a shotgun. They are killed instantly.
10:15 AM
Burns and Idaho are seen shooting out a classroom window at first responders, no one is injured by gunfire.
10:18 AM
Idaho and Burns are seen by witnesses proceding to the cafeteria, the witnesses report hearing explosions and gunfire in the cafeteria. CCTV footage shows the two shooting at the cafeteria propane bomb, partially detonating it.
10:25 AM
The suspects are once again spotted by CCTV in the library, Idaho spots Richie Maurico and Brinn Thompson hiding behing a couch and shoots him instantly. CCTV catches Richie Maurico slowly bleeding out behind the couch.
10:29 AM
Witnesses describe hearing Idaho and Burns talk about suicide.
10:33 AM
Witnesses hear two more gunshots in a corner of the library. CCTV footage catches the suspects dead in the library.
10:39 AM
A croud of students are seen on CCTV footage running down the hallways near the library, to the emergency exit, the emergency exit alarm is triggered, activating the sprinklers.
A diagram of the school's library. Richie Maurico and Brinn Thompson can be
seen deceased behind the library's couches.