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.

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.

"Prank" is not the right word here.