A fingerprint found on a plastic bag that contained Natasha McShane's passport was matched to another one taken from the man accused of trying to kill her, a US court has heard.
Heriberto Viramontes is on trial in Chicago for the attempted murder of the Co Armagh woman during a mugging in 2010.
The former exchange student from Silverbridge was left with brain damage and now requires constant care.
Fingerprint expert Michael Cox yesterday told Cook County Criminal Court that a print found on a plastic bag found dumped in a bin outside a petrol station matched one taken from Viramontes.
The court previously heard that the bag had contained Natasha's passport and other items.
Viramontes' co-defendant – and now the chief prosecution witness against him – Marcy Cruz testified she saw him "throw some stuff into a garbage can" at the station, where the pair were also caught on camera.
It also emerged that prosecutors have hours of taped jailhouse telephone conversations made by Viramontes.
The tapes include conversations with Kira Lundgren, his former girlfriend and the mother of his child, the court heard.
Excerpts of those and other recordings have not yet been aired in court but are expected to be heard.
Ms Lundgren, a 25-year-old mother of two, testified against her former lover yesterday.
Lundgren was picked up from her apartment by Viramontes and his Cruz on the night of the attack, April 23, 2010.
Viramontes was agitated, Lundgren said. She said she knew this because of his speech and hand movements.
She saw him with a card when they stopped at a petrol station.
Lundgren also recalled going to Cruz's apartment the following day. Cruz motioned to a table where Lundgren saw "high end" perfume.
Viramontes and Cruz's boyfriend were also in the apartment. Cruz testified she took Dior perfume and foundation after being told to take what she wanted from two purses Viramontes had with him around the time of the attacks and close to where Natasha and her friend Stacy Jurich were beaten.
Under cross examination, Lundgren said she saw no blood on Viramontes or in a van he had been a passenger in at the time of the attack. She was not asked to wash any clothes by Viramontes.
Viramontes (34) denies two counts of attempted murder.