McKinney, a trans boy, was sentenced to life in prison with the possibility of parole last summer.
Erickson’s defense claims McKinney forced Erickson to participate in the shooting.
On Wednesday, McKinney testified that he did not threaten Erickson and that Erickson agreed to go through with their plan.
McKinney said they were both upset because Erickson’s girlfriend at the time, who was also McKinney’s friend, was not happy with them and they felt they’d “lost” her. McKinney said that was the “pushing point” in their decision to go through with the shooting.
McKinney said he and Erickson snorted cocaine the morning before the shooting.
Another friend, David Sispera, testified on Monday that he and Erickson also snorted cocaine, and smoked marijuana, in a separate instance at Erickson’s house that morning.
McKinney said he and Erickson used a crowbar and an ax to break into Erickson’s parents’ gun safe. McKinney said it took about an hour.
McKinney became emotional when photos taken the day of the shooting were shown in court.
On Monday, Padgett testified that he had received a message from Erickson to meet him in the bathroom, but he didn’t go, and was not warned about the shooting.
McKinney said he did talk to another student named Grace Weber — and told her to leave because he didn’t want her in there. He said Weber did leave the classroom.
McKinney cried as he described Erickson taking the gun out of his guitar case and pointing it into Room 107.
“I then also fired shots,” McKinney testified. “I remember people coming at me, and I remember shooting aimlessly.”
On Tuesday, McKinney that he and Erickson planned to kill everyone in Room 107. McKinney said he would take the blame and Erickson would look like a hero.
Kendrick Castillo was killed while trying to subdue Erickson after he allegedly pulled a gun in Room 107 on May 7, 2019.