Jayme Pasieka was found guilty Friday of two counts of first-degree murder for killing two men at a Loblaws warehouse in February 2014.
Several men wearing baby-blue Loblaws hoodies fist-bumped and one exhaled "yes" as the jury announced its verdict just before 4 p.m.
Pasieka, staring straight ahead, did not react to the verdict.
Pasieka, 32, was also convicted on four counts of attempted murder and four counts of aggravated assault.
On Feb. 28, 2014, Pasieka stabbed six people at the west-end warehouse where he worked killing Fitzroy Harris and Thierno Bah.
Pasieka's mental health played a pivotal role in the trial, namely whether it affected his ability to plan the killings.
During the trial, a psychiatrist testified that Pasieka likely suffered from schizophrenia.
After the verdict, Crown prosecutor Kimberly Goddard told reporters this wasn't the first time she had to prosecute someone who used schizophrenia as a defence.
"It does have a certain amount of complexity to it," she said. "There are people out there who seek help appropriately; they seek treatment; they go to family, friends, doctors; and they're able to seek help that way.
"Unfortunately Mr. Pasieka didn't take any of those steps."
Each first-degree murder conviction comes with an automatic life sentence.
In cases of more than one conviction for first-degree murder, judges can decide to have the sentences served concurrently or consecutively.
Jury members agreed unanimously Friday to make no recommendation to the judge on sentencing.
Court of Queen's Bench Justice Donna Shelley adjourned sentencing until next week.
Jury reviewed Pasieka's testimony
The jury of nine women and three men began deliberating Thursday evening. On Friday morning, they returned to the courtroom to request the chance to review Pasieka's testimony given during the trial.
To convict Pasieka of first-degree murder, the jury had to conclude that the Crown had proved beyond a reasonable doubt that the accused intended to kill two men or to harm them in such a way that death would be likely.
In her instructions Thursday, Shelley told the jury they must consider all the evidence, including Pasieka's state of mind at the time of the killings.
Pasieka testified that he wanted to kill people so that he would be caught by police and get help for his "suffering."
In his closing argument, defence lawyer Peter Royal asked the jury to find his client guilty of the lesser, but included, offence of manslaughter.
The jury also had the option to find him guilty of second-degree murder.