Breivik's trail - Evidence presented in court

The presentation of evidence from the bombing of the main Government office buildings in Oslo on July 22nd started Tuesday, with several witnesses testifying. Among them was a security guard in the Government quarter, an expert on explosions, and police chief Thor Langli, who was in charge of the police's efforts after the bomb attack.

"It was strange to come back and open the case again, explains Langli. I noticed that I choked up a couple of times," he tells media when describing how it felt to testify in court yesterday.

Langli also described the situation right after the bomb went off as extremely chaotic. The police had been notified that a person wearing a police uniform was responsible for the attacks, and had given orders to refuse entry to all police officers they didn't know at closures and check points. "In worst case scenario we were told to use our weapons to refuse them," he explains.

After lunch, the court started the presentation of the investigation from the crime scene, and the autopsy reports of all the victims who were killed in the explosion.

Several of the victims' friends and family had chosen not to meet in court Tuesday. Many of the people who were there cried when Arne Stray-Pedersen from the National Institute of Health and Police Chief Ole-Morten Støseth read details and information from the autopsy reports.

"It makes a strong impression to hear all these gruesome details," says lawyer Christian Lundin, who is representing a family that lost their daughter in the explosion in Oslo. "The family has tried to prepare themselves, they've read the autopsy report and seen in the pictures in advance. But to listen to the findings in court today is still heavy stuff," Lundin tells media.

The presentation of evidence from the bombing and investigation in Oslo continues Wednesday.