function preventDM ( attacker, attacker2 )
    if ( attacker2 ) and ( attacker ) and ( attacker ~= attacker2 ) then
        local attackerTeam = ( getTeamName( getPlayerTeam( attacker ) ) )
        local sourceTeam = ( getTeamName( getPlayerTeam( attacker2 ) ) )
        if ( getElementDimension ( attacker ) == 0 and getElementDimension ( attacker2 ) == 0 ) then
        if ( attackerTeam == "Criminals" ) then
            if ( sourceTeam == "Criminals" ) or ( sourceTeam  == "Civilian Workers" ) then
                return false
            else
                return true
            end
        elseif ( attackerTeam == "Civilian Workers" ) then
            if ( sourceTeam == "Criminals" ) or ( sourceTeam  == "Civilian Workers" ) then
                return false
            else
                return true
                end
            end
        end
    end
end
addEventHandler ( "onClientPlayerWeaponFire", getLocalPlayer(), preventDM )