function preventDM(attacker)
    if (attacker and getElementType(attacker) == "player") then
        local attackerTeam = getTeamName(getPlayerTeam(attacker))
        local sourceTeam = getTeamName(getPlayerTeam(source)) -- source is the player who got damaged
        if (getElementDimension(attacker) == 0 and getElementDimension(source) == 0) then
        if (attackerTeam == "Criminals") then
            if (sourceTeam == "Criminals" or sourceTeam  == "Civilian Workers") then
                return false
            end
            return true
        elseif (attackerTeam == "Civilian Workers") then
            if (sourceTeam == "Criminals" or sourceTeam  == "Civilian Workers") then
                return false
            end
            return true
            end
        end
    end
end
addEventHandler("onClientPlayerDamage", root, preventDM)