"No comment," was one of the most common answers Mangs gave.
The prosecutor started by asking Mangs if he shot 20-year-old Trez West Persson in October 2009. Mangs denied committing the crime.
Asked about his weapons and why he bought extra barrels, Mangs answered that he was interested in technology.
The prosecutor asked him about his social contacts and the friend to whom he confided killing Persson.
He was asked about the casings found on the site where Persson was shot to death and a 22-year-old man was seriously injured by shots. According to the prosecutor, the forensic investigation showed that the casings came from Mangs' weapon.
The defendant's explanation was that he left casings at several shooting ranges in Skåne.
He said that someone switched the barrels on his weapon to explain the fact that his barrel was used to murder West Persson.
When the prosecutor asked him why someone would switch the barrels and who would do that, Mangs intimated that it could have been a former friend who will be called as a witness in the trial.