It's been more than two years since the shooting happened at STEM School Highlands Ranch.
Tuesday, the second shooter was found guilty on all charges.
Here's a timeline of what's happened.
Alec McKinney testifies at Devon Erickson's STEM School shooting trial
Alec McKinney, who pleaded guilty to murder and other counts in the STEM School shooting, testified Tuesday afternoon and Wednesday..
7News - The Denver Channel
