regard criminal offences such as those referred to in the second
subparagraph of Article 83 (1) TFEU as constituting a particularly serious threat to one of the fundamental interests of society, which might pose a direct threat to the calm and physical security of the population and
thus be covered by the concept of «imperative grounds of public security» -LSB-...], as long as the manner in which such offences were committed discloses particularly serious characteristics, which is a matter for the referring court to determine -LSB-...].