function role.frontirenemy(RoleID, a, KillerID)
	Sql_con()

	local killer_id = 0
	for found_killer in rows(con, string.format("SELECT `KillerID` FROM frontir_lastenemy WHERE RoleID = %s", RoleID)) do
		killer_id = found_killer
	end
	if killer_id == 0 then
		sql = "INSERT INTO frontir_lastenemy VALUES ('%s', 9999)"
		con:execute(sql:format(RoleID))
	elseif 1 <= KillerID then
		sql = "Update frontir_lastenemy set KillerID = '%s' where RoleID = '%s'"
		con:execute(sql:format(KillerID, RoleID))
	end
	con:close()
	env:close()
	return killer_id
end