What causes mass shootings more: Psychopathy or Depression?

Have you ever examined the Columbine shooters journals? Like night and day. Yet they both acted together.

Jnc…psycho at top, depressive below.
Jnc…psycho at top, depressive below.
Psychopathy
Depression
Select gender and age to cast your vote:
What causes mass shootings more: Psychopathy or Depression?
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