Part One
GENERAL PROVISIONS
Chapter VII
EVIDENTIARY ACTIONS
4. HEARING OF THE ACCUSED PERSON
Confession of the Accused Person and Further Collection of Evidence
Article 105
(1) In the case of confession of the accused person, the authority conducting the procedure shall continue collecting evidence on the criminal offence only if the confession is obviously false, incomplete, contradictory or unclear.
National proceedings on admission of guilt
EDIT.