Authorities collect DNA from Chicago sex offenders

Authorities in Illinois have collected DNA from more than 100 people living in Chicago who were convicted of serious sex crimes in other states.

The effort this week was led by Attorney General Lisa Madigan’s office and was in line with an Illinois law that requires all sex offenders to submit specimens to the state’s DNA database even if they were convicted outside Illinois.

Madigan’s office said Wednesday that expanding the state’s database will make it a stronger tool for law enforcement investigators and will help exonerate those who have been wrongly convicted.