LegalSpeak: Illinois State Law on Consecutive Sentencing
730 ILCS 5/5-8-4 CONCURRENT AND CONSECUTIVE TERMS OF IMPRISONMENT (d) CONSECUTIVE TERMS; MANDATORY. The court shall impose consecutive sentences in each of the following circumstances:
(1) One of the offenses for which the defendant was convicted was first degree murder or a Class X or Class 1 felony and the defendant inflicted severe bodily injury.
(2) The defendant was convicted of a violation of Section 12-13 (criminal sexual assault), 12-14 (aggravated criminal sexual assault), or 12-14.1 (predatory criminal sexual assault of a child) of the Criminal Code of 1961.
(3) The defendant was convicted of armed violence based upon the predicate offense of any of the following: solicitation of murder, solicitation of murder for hire, heinous battery, aggravated battery of a senior citizen, criminal sexual assault, a violation of subsection (g) of Section 5 of the Cannabis Control Act, cannabis trafficking, a violation of subsection (a) of Section 401 of the Illinois Controlled Substances Act, controlled substance trafficking involving a Class X felony amount of controlled substance under Section 401 of the Illinois Controlled Substances Act, a violation of the Methamphetamine Control and Community Protection Act (720 ILCS 646/), calculated criminal drug conspiracy, or streetgang criminal drug conspiracy….
(4) The defendant was convicted of a violation of Section 9-3.1 (concealment of homicidal death) or Section 12-20.5 (dismembering a human body) of the Criminal Code of 1961.
(5) If the defendant was in the custody of the Department of Corrections at the time of the commission of the offense, the sentence shall be served consecutive to the sentence under which the defendant is held by the Department of Corrections. If, however, the defendant is sentenced to punishment by death, the sentence shall be executed at such time as the court may fix without regard to the sentence under which the defendant may be held by the Department.
(6) A sentence under Section 3-6-4 for escape or attempted escape shall be served consecutive to the terms under which the offender is held by the Department of Corrections….