Chapter 968 is titled COMMENCEMENT OF CRIMINAL PROCEEDINGS and includes
968.02 Issuance and filing of complaints.
968.03 Dismissal or withdrawal of complaints.
968.04 Warrant or summons on complaint.
968.05 Corporations or limited liability companies: summons in criminal cases.
968.06 Indictment by grand jury.
968.07 Arrest by a law enforcement officer.
968.073 Recording custodial interrogations.
968.075 Domestic abuse incidents; arrest and prosecution.
968.08 Release by law enforcement officer of arrested person.
968.085 Citation; nature; issuance; release of accused.
968.09 Warrant on failure to appear.
968.10 Searches and seizures; when authorized.
968.11 Scope of search incident to lawful arrest.
968.12 Search warrant.
968.13 Search warrant; property subject to seizure.
968.135 Subpoena for documents.
968.14 Use of force.
968.15 Search warrants; when executable.
968.16 Detention and search of persons on premises.
968.17 Return of search warrant.
968.18 Receipt for seized property.
968.19 Custody of property seized.
968.20 Return of property seized.
968.205 Preservation of certain evidence.
968.21 Search warrant; secrecy.
968.22 Effect of technical irregularities.
968.24 Temporary questioning without arrest.
968.25 Search during temporary questioning.
968.255 Strip searches.
968.256 Search of physically disabled person.
968.26 John Doe proceeding.
968.265 Lie detector tests; sexual assault victims.
968.28 Application for court order to intercept communications.
968.29 Authorization for disclosure and use of intercepted wire, electronic or oral
968.30 Procedure for interception of wire, electronic or oral communications.
968.31 Interception and disclosure of wire, electronic or oral communications
968.32 Forfeiture of contraband devices.
968.33 Reports concerning intercepted wire or oral communications.
968.34 Use of pen register or trap and trace device restricted.
968.35 Application for an order for a pen register or a trap and trace device.
968.36 Issuance of an order for a pen register or a trap and trace device.
968.37 Assistance in the installation and use of a pen register or trap and trace
968.38 Testing for HIV infection and certain diseases.
968.40 Grand jury.
968.41 Oath or affirmation of grand jurors.
968.42 Presiding juror and clerk.
968.43 Reporter; salary; assistant.
968.45 Witness rights; transcripts.
968.47 District attorney, when to attend.
968.48 Attendance; absence; excuse; number required for grand jury session;
number required to concur in indictment.
968.49 Fine for nonattendance.
968.50 Report progress and return indictments.
968.505 Procedure upon discharge of grand jury.
968.51 Indictment not to be disclosed.
968.52 Votes not to be disclosed.
968.53 When testimony may be disclosed.
968.31 covers eavesdropping. Is it the only apropos chapter? I can't say because the Wisc Statutes are apparently constructed to employ many attorneys.