(19)To ensure the successful investigation and prosecution of money laundering offences, those responsible for investigating or prosecuting such offences should have the possibility to make use of effective investigative tools such as those which are used in combating organised crime or other serious crimes. It should thereby be ensured that sufficient personnel and targeted training, resources and up-to-date technological capacity are available. The use of such tools, in accordance with national law, should be targeted and take into account the principle of proportionality and the nature and seriousness of the offences under investigation and should respect the right to the protection of personal data.