Clearly both of the mentioned groups are guilty of some wrongdoing.
One made a prank, misleading dangerous and fraudulent phone call.
One shot an unarmed man in the face/body.
One of those scenarios is not like the other in terms of magnitude.
"Prank" is not the right word here.
Phone calls that are intended to cause violence, terror, and possibly death aren't what I would call a "prank". They might still be different in magnitude, but both should involve a jury and jailtime.