Former Defense Secretary Jim Mattis speaks in Chicago. Teaching abstinence in schools. A new series on criminal justice from all angles. Plus: Ask Geoffrey and Chicago company Smashed Plastic.

• Former Defense Secretary Jim Mattis Opens Up in Chicago Speech
• How Should Illinois Schools Teach Sex Education?
• Crain’s Headlines: New Private Sector Gig for Lisa Madigan
• New Series ‘We Are Witnesses’ Explores Criminal Justice in Chicago
• Local Rehab Hospital Turns Gun Violence Victims into Able Survivors
• Spotlight Politics: Illinois Has a New Supreme Court Justice
• For First Time in 30 Years, Vinyl Records Being Made in Chicago
• Ask Geoffrey: What’s the ‘Polish Cathedral’ Architectural Style?