Randy Tshilumba googled a multitude of subjects in the hours and days after he killed Clémence Beaulieu-Patry last year at the Maxi supermarket in St. Michel, including "cortisol," "perfect murder," "how to clean blood stains," and "weapon disposal."
Tshilumba was asked about these Internet entries at his first degree murder trial.
Tshilumba, now 21, is accused in the death of Beaulieu-Patry who was killed while working at the Maxi on Papineau in April 2016.
When asked why he Googled words such as "supermarket murder", Tshilumba testified he wanted to know if Beaulieu-Patry, 20, had killed anyone or had been arrested.
Tshilumba had testified earlier he thought Beaulieu-Patry and her friends were out to kill him.
His lawyers are trying to show Tshilumba was suffering from delusions stemming from mental illness.
When asked why he googled "how to clean blood stains," and "weapon disposal," Tshilumba testified he didn't want his mother to know what had happened.
Tshilumba testified he had gone to the Maxi on April 10, 2016 - the third of three visits - to try to talk Beaulieu-Patry out of following him and killing him.
Tshilumba testified he bounded over to Beaulieu-Patry, trying to act cool and be friendly.
He testified Beaulieu-Patry told him, "Not you again, you filthy negro," which he said surprised him.
Tshilumba testified Beaulieu-Patry pointed a finger at him and it looked like she was going to pull a gun out of her pocket so that's when he stabbed her three times in the chest. Tshilumba said he wanted to protect himself and the clients who were there.
Tshilumba told the court that when she cried out for help, he thought she was calling out to her friends to help so he continued to stab her.
Tshilumba said that when she fell over, he stabbed her in the neck two or three times.
He testified he fled to a nearby Tim Hortons because he was afraid she and her friends would come after him.
Tshilumba hid in the bathroom and texted his brother and two friends to help him and to come get him.
Tshilumba was arrested two days later.
Tshilumba testified he didn't remember searching on the Internet for certain topics such as "perfect murder."
He said he searched for other subjects such as "military testosterone" and others linked to hormones because he wanted to know why people often thought men were the ones who killed people and not women.
Tshilumba continues his testimony on Monday.