Cops are such pigs! With this plugin Pigman "Cops" are spawned when someone makes the mistake of breaking the law. (Killing someone)

This plugin adds the ability to:

Create a random amount of cops when a player kills a player, at the dead player's location, of which the maximum can be defined in the console!
Allow other Cops, AKA people with the permission to type /crimescene to teleport to the crime scene after a few seconds!
When players are "wanted" for killing someone else, and a third party kills them, Cops will not spawn!
Wanted players' names turn red above their head.
Anyone can check if a player is wanted by doing /wanted (player)!
Cops despawn after 5 minutes!
People Cops can make people wanted using /makewanted (player) (reason)!
Cops only target wanted players, innocent people are completely safe!
Pigman cops don't drop their armor after being killed, allowing for a steady economy.
The pigmen have all black leather armor when they spawn, so you can easily tell that they're cops.

Wanted Status

Player's with a wanted status are free to kill by anyone without the killer gaining a wanted status!

Players are automatically made wanted after killing a player.
Can also be set manually by people with the permission cops.wanted.
Wanted status is automatically removed after 5 minutes
Anyone can check someone's wanted level by using /wanted (player)
Wanted players get a red nametag above their head!

This plugin is great for GTA and Prison servers, but you can also use it for Role Play servers where you need a deterrent from players PvPing but making it as realistic as possible.

Commands:

/makewanted (player) (reason) : Makes a player wanted, for a defined reason.
/wanted (player) : Checks if a player is wanted and gives you the reason if so.
/crimescene : Teleports "Cops" (Players with the "cops.crimescene" permission) to teleport to the location that the player was killed at.

Permissions:

cops.crimescene: Allows players with this permission to teleport to the crimescene after 5 seconds.
cops.wantedmessage: Allows players to receive the message that notifies them that a player is wanted.
cops.wanted: Allows players to use /makewanted to make others wanted.

This plugin needs the plugin TagAPI to function, which allows the coloured name tag, this plugin can be found here.

New Features:

Allowed the join message to be toggled on or off.
Added a feature that allows you to specify which worlds the plugin affects.

If this plugin catches on, I will make it a lot more configurable, so you guys, the server owners can decide what you feel is balanced.

GTA/Prison Cops!