i've seen way to many videos of people getting shot not doing anything to deserve it other than being mentally disturbed and not grasping the gravity of their situations. I don't think it's necessarily that it's happening more but there is video tech in everyone's pockets to document it's frequency.
Crazy guy runs from cops, they execute him when he stops for them .
https://www.youtube.com/watch?v=y-0uqFTBclo