A trial is underway for a Laconia man accused of stabbing his friend to death with a sword and other items in 2019.In opening statements Monday, prosecutors said Hassan Sapry, 24, killed his friend, Wilfred Guzman, 57, in the victim's Laconia townhouse in April 2019. Sapry is facing several charges, including first-degree murder.>> Opening statement videos: Prosecution | DefenseThe two had previously been college roommates, and prosecutors said Sapry was angry over a conversation they had that night regarding race and religion."The defendant told investigators that even though he had known Wilfred and Wilfred's daughter for years and loved them," said Senior Assistant Attorney General Danielle Sakowski. "Wilfred had said and done things that the defendant said made him, in his own words, 'super angry.'"Defense attorney Mark Sisti said Sapry is not guilty by reason of insanity, detailing years of alleged psychological issues stemming back to his childhood growing up in wartime Iraq."His brain was not there," Sisti said. "It was out of control. It was a frenzied, out-of-control killing motivated by nothing except the demons within."Investigators said Sapry used a sword, kitchen utensils and other weapons during the attack, causing over 140 wounds.>> See a previous story about suspect's lawyer commenting on the case here.A state police sergeant who was at the scene in 2019 working as an evidence technician for the major crimes unit testified after opening statements were given. He presented physical evidence to the jury, including broken knives, mangled forks and kitchen tongs, which investigators said were found with blood on them.Testimony is scheduled to continue Tuesday morning, and the trial is expected to last through Sept. 2.