Translate the following English sentence to French:
"The Liberal Group believes that, in addition to all kinds of practical measures which are included in the document, it is, in particular, high time that criminal prosecution was improved by means of European cooperation."
Le groupe des libéraux estime que, outre toutes les mesures pratiques reprises ici dans le document, il est surtout grand temps d'améliorer le système des poursuites judiciaires grâce à une collaboration au niveau européen.