Semen stains containing the DNA of one of the boys accused of Anastasia Kriegel's murder was found on a vest top in the room where her body was discovered, the Central Criminal Court has heard.
A forensic scientist also told the trial that a bra and vest top found at the scene were torn and could not be worn in the condition they were found in.
The accused, who are both 14, cannot be named because they are minors. They have each pleaded not guilty to murdering the 14-year-old Kildare schoolgirl at Glenwood House, Laraghcon, Clonee Road, Lucan on 14th May last year. Boy A is further charged with the 14-year-old’s aggravated sexual assault in a manner that involved serious violence to her. He has pleaded not guilty to that count.
Marce Lee Gorman of Forensic Science Ireland told prosecution counsel Brendan Grehan SC that she was aware that Ana had been found naked but for a pair of socks in a derelict building. The scientist examined a black, Penney's vest top that was found at the scene and found two semen stains. One was in the right, upper shoulder strap area and the other in the hem area at the bottom. Tests on both stains showed the presence of mixed DNA profiles matching that of Ana and Boy A and another unidentified person.
Ms Lee Gorman considered the possibility that the mixed DNA profile originated from Boy A and Ana and another person or that it originated from three unknown, unrelated people and concluded that it is 1,000 million times more likely that it originated from Boy A, Ana and an unknown person.
She said that washing removes semen and therefore the semen stain on the top was made some time after the top was last washed. Ms Lee Gorman also examined damage to the vest top. The right shoulder strap was stretched and had unravelled through pulling, she said. The hem, she said, was torn rather than cut, the stitching of the left shoulder strap was undone and she pointed out an area that was "completely severed".
She added: "Force was required to cause this damage and it can't be worn in this condition." She discovered male DNA on the top and sent it for male specific DNA sampling but the scientist who carried out that examination said the sample was not suitable for further examination.
Ms Lee Gorman also examined a white padded Penney's bra found at the scene which had four blood stains containing DNA that matched Ana's blood. The fabric joining the cups was torn apart and the clasp at the back was stretched and bent possibly by pulling. She again concluded that force was required to cause the damage and the bra could not be worn in the condition it was in.
The trial continues in front of Justice Paul McDermott and a jury of eight men and four women.