WOBURN — A man was convicted today of stabbing his girlfriend to death in Burlington last year even as she begged him to stop and professed her love for him.
Christopher Piantedosi was convicted in Middlesex Superior Court of first-degree murder in the death of Kristen Pulisciano inside her Burlington home on May 3, 2012.
Pulisciano’s friends and family embraced tearfully after the verdict was announced. Piantedosi showed no emotion.
The verdict came after less than a full day of deliberations by a jury, which rejected the defense’s argument that Piantedosi could not control himself when he stabbed Pulisciano, 33 times.
The attack was witnessed by a teenager who had been videochatting with the slain woman’s daughter on his iPad, according to testimony at the trial.
Conceding that Piantedosi was the attacker, his defense attorney, Michael Collora, urged jurors today to find his client not guilty by reason of insanity, citing chronic drug abuse and chronic mental illnesses, which he identified as depression and bipolar disorder.
“He lost control and was unable to appreciate what he was doing,’’ Collora told jurors. “He was not responsible for his criminal actions.’’
But Middlesex Assistant District Attorney Nicole Allain pointed to the viciousness of the attack and evidence showing he planned it in advance and remained in full command of himself during the slaying and its aftermath.
“It’s done. She’s gone,” Piantedosi texted a friend after the killing, according to Allain. “I stabbed the [expletive] out of her.”
She also said that after the attack, Piantedosi drove to a mall in Leominster where he changed all of his clothes. The prosecutor questioned the defense claim that Piantedosi was mentally ill, noting that two hospitals had examined him but did not diagnose him as being mentally ill.
Allain said Pulisciano’s killing was an act of vicious domestic violence committed by a man who was furious at his long-time girlfriend, whom he had physically and mentally abused in the past, for standing up to him and throwing him out of their home.
“This was his final attempt to control her,’’ Allain said.
During the trial, jurors were told that as Piantedosi was stabbing his girlfriend, she asked him to stop and continued to express her love for him.
“Chris, please stop!’’ Pulisciano said to Piantedosi, according to prosecution witnesses. “I love you.’’
But, according to Allain, prosecution witnesses also testified that Piantedosi responded, “You’re going to die.”
At one point, as Allain mentioned the 33 stab wounds Pulisciano had suffered, Piantedosi could be seen yawning.Peter Schworm can be reached at firstname.lastname@example.org. Follow him on Twitter @globepete.