Questão jurídica principal
Whether § 198(1) StPO/BS provided a sufficient legal basis for provisional custody after the sentence expired.
Decisão extraída
§ 198(1) StPO/BS could serve as a basis for security measures, but custody required a special detention ground.
Fundamentação extraída
The provision allows the necessary measures to secure execution of a non-final judgment. In a post-proceedings context, liberty-depriving custody is permissible only if the statutory conditions for detention are met.