725 ILCS 5/ Code of Criminal Procedure of 1963.

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725 ILCS 5/107-8

(725 ILCS 5/107-8) (from Ch. 38, par. 107-8)

Sec. 107-8.

Assisting peace officer).

(a) A peace officer making a lawful
arrest may command the aid of
persons over the age of 18.

(b) A person commanded to aid a peace officer shall have the same
authority to arrest as that peace officer.

(c) A person commanded to aid a peace officer shall not be civilly
liable for any reasonable conduct in aid of the officer.

(Source: P.A. 80-360.)

725 ILCS 5/107-9

(725 ILCS 5/107-9) (from Ch. 38, par. 107-9)

Sec. 107-9. Issuance of arrest warrant upon complaint.

(a) When a complaint is presented to a court charging that an offense
has been committed, it shall examine upon oath or affirmation the
complainant or any witnesses.

(b) The complaint shall be in writing and shall:

(1) State the name of the accused if known, and if

not known the accused may be designated by any name or description by which he can be identified with reasonable certainty;

(2) State the offense with which the accused is

charged;

(3) State the time and place of the offense as

definitely as can be done by the complainant; and

(4) Be subscribed and sworn to by the complainant.

(b-5) If an arrest warrant or summons is sought and the request is made by electronic means that has a simultaneous video and audio transmission between the requester and a judge, the judge may issue an arrest warrant or summons based upon a sworn complaint or sworn testimony communicated in the transmission.

(c) A warrant or summons may be issued by the court for the  arrest or appearance of the person
complained against if it appears from the contents of the complaint and the
examination of the complainant or other witnesses, if any, that the person
against whom the complaint was made has committed an offense.

(d) The warrant of arrest or summons shall:

(1) Be in writing;

(2) Specify the name, sex and birth date of the

person to be  arrested or summoned or,  if his name, sex or birth date is unknown, shall designate such person by any name or description by which the person can be identified with reasonable certainty;

(3) Set forth the nature of the offense;

(4) State the date when issued and the municipality

or county where issued;

(5) Be signed by the judge of the court with the

title of the judge's office; and

(6) Command that the person against whom the

complaint was made to be arrested and brought before the court issuing the warrant or the nearest or most accessible court in the same county, or appear before the court at a certain time and place;

(7) Specify the conditions of pretrial release, if

any; and

(8) Specify any geographical limitation placed on the

execution of the warrant, if any, but such limitation shall not be expressed in mileage.

(e)   The summons may be served in the same manner as the summons in a civil action, except that a police officer may serve a summons for a violation of an ordinance occurring within the  municipality of the police officer.

(f)   If the person summoned fails to appear by the date required or cannot be located to serve the summons, a warrant may be issued by the court for the arrest of the person complained against.

(g)   A warrant of arrest issued under this Section shall incorporate the information included in the summons, and shall comply with the following:

(1) The arrest warrant shall specify any geographic

limitation placed on the execution of the warrant, but such limitation shall not be expressed in mileage.

(2) The arrest warrant shall be directed to all peace

officers in the State. It shall be executed by the peace officer, or by a private person specially named therein, at any location within the geographic limitation for execution placed on the warrant.  If no geographic limitation is placed on the warrant, then it may be executed anywhere in the State.

(h) The arrest warrant or summons may be issued electronically or electromagnetically by
use of electronic mail or a facsimile transmission machine and any such arrest warrant or summons shall have the
same validity as a written arrest warrant or summons.

(Source: P.A. 101-239, eff. 1-1-20; 101-652, eff. 1-1-23; 102-1104, eff. 1-1-23.)

725 ILCS 5/107-10

(725 ILCS 5/107-10) (from Ch. 38, par. 107-10)

Sec. 107-10.

Defective warrant.

A warrant of arrest shall not be quashed or abated nor shall any person
in custody for an offense be discharged from such custody because of
technical irregularities not affecting the substantial rights of the
accused.

(Source: Laws 1963, p. 2836.)

725 ILCS 5/107-11

(725 ILCS 5/107-11) (from Ch. 38, par. 107-11)

Sec. 107-11. When summons may be issued.

(a) When authorized to issue a warrant of arrest, a court may instead
issue a summons.

(b) The summons shall:

(1) Be in writing;

(2) State the name of the person summoned and his or

her address, if known;

(3) Set forth the nature of the offense;

(4) State the date when issued and the municipality

or county where issued;

(5) Be signed by the judge of the court with the

title of his or her office; and

(6) Command the person to appear before a court at a

certain time and place.

(c) The summons may be served in the same manner as the summons in a
civil action or by certified or regular mail, except that police officers may serve summons for violations
of ordinances occurring within their municipalities.

(Source: P.A. 102-1104, eff. 12-6-22.)

725 ILCS 5/107-12

(725 ILCS 5/107-12) (from Ch. 38, par. 107-12)

Sec. 107-12.

Notice to appear.

(a) Whenever a peace officer is authorized to arrest a person without a
warrant he may instead issue to such person a notice to appear.

(b) The notice shall:

(1) Be in writing;

(2) State the name of the person and his address, if known;

(3) Set forth the nature of the offense;

(4) Be signed by the officer issuing the notice; and

(5) Request the person to appear before a court at a certain time and
place.

(c) Upon failure of the person to appear a summons or warrant of arrest
may issue.

(d) In any case in which a person is arrested for a Class C misdemeanor
or a petty offense and remanded to the sheriff other than
pursuant to a court order, the sheriff may issue such person a notice to appear.

(Source: P.A. 83-693.)