In 1976, Patricia Columbo, then 19, and her boyfriend, Frank DeLuca, were convicted of murdering her parents and her 13-year-old brother in Elk Grove Village. The victims were stabbed, shot and bludgeoned.
Columbo and DeLuca were sentenced to 200 to 300 years in prison. Columbo has been up for parole at least 15 times.
On Wednesday, the parole board heard testimony from some involved in the original case.
"I truly believe this woman is evil through and through," Patricia Bobb, prosecutor.
Columbo is now 54 and DeLuca is 72.