In 2009, a visiting imam was injured by glass shards as a shot went through the window of the Islamic Centre, where several people were drinking tea after Friday prayers.
The police found bullet casings 90 metres away, which have been connected to Mangs' weapon.
The suspect has again said he has not always kept an eye on his weapon, and the illegal extra barrels he purchased for it, implying therefore that someone else could have been the shot, reports Swedish Radio.
Several weeks into the lengthy trial, Swedish Radio reports that Peter Mangs has repeatedly told the court that he likes being in custody and has no interest in remembering things he has done.
"I have forgotten everything. I try to not think back, because it doesn't interest me," he said Friday.