The evidence: Catching Robert Koppa
At the age of 17, Angela Rose (last name not used) was kidnapped at knifepoint in the parking lot of a suburban Chicago mall. As her ordeal unfolded over the next few hours, she didn't know if she would survive.
Her abductor had blindfolded her - and didn't know that Angela Rose could still see to either side. She noticed and remembered this village sticker on his car's windshield as he drove her to a forest preserve. Later on, this detail would help identify her attacker as Robert Koppa.
The Captor's Car
This is Robert Koppa's 1987 Trans Am - the car used to abduct Angela. She gave police an accurate description: that it was brown, an older model and messy.
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Inside the Car
Angela Rose was able to see this beaded seat cushion out of the corner of her eye -- and accurately describe it to police later on.
The Car's Antenna
Angela Rose also described the duct tape on the car's antenna. When police found the car, they discovered her description was dead-on.
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The Knife
This is the knife Robert Koppa held to Angela's throat. It was big, sharp and terrifying.
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The Hidden Weapon
When police searched Koppa's car they discovered the knife was kept in a sheath right next to the seat belt.
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The Styrofoam Cooler
Angela Rose described hearing a "squeaking" sound in the back of the car. It was Koppa rummaging through this Styrofoam cooler, where he kept a collection of women's lingerie in different sizes.
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Koppa's Collection
Police found assorted items of women's lingerie in Robert Koppa's home closet - including pieces he forced Angela Rose to put on before sexually assaulting her.
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The Sketch
Thanks to Angela Rose's detailed recall, police were able to create this composite sketch of her abductor.
It's called an "EFIT" - a computer program used instead of traditional sketch artists. The program contains thousands of individual facial features that can be called up and combined.
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The Real Robert Koppa
The sketch was so accurate that when it was shown on TV, a detective from a nearby town was able to identify Koppa as the suspect. The detective was familiar with Koppa's life-long history of crime - including murder.
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Robert Koppa Today
The most recent photo of Robert Koppa from the Illinois Department of Corrections. He is serving life without parole.