GENERAL PART
Section One : GENERAL PROVISIONS
CHAPTER 2. PRINCIPLES OF CRIMINAL PROCEEDINGS
Article 7. Legitimacy
2. In connection with a criminal case, no person may be detained, arrested, searched, taken into custody, or subjected to any other measure of procedural compulsion or conviction or other restriction of his rights and freedoms otherwise than on the grounds and by procedure prescribed by law.
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
EDIT.