(CNN) A Colorado jury on Tuesday found one of the suspects in a deadly Colorado school shooting guilty of more than 40 charges, including murder.
Devon Erickson was found guilty of first-degree murder degree with extreme indifference, first degree-murder, conspiracy to commit first-degree murder and 30 counts of criminal attempt of first-degree murder.
He also was found guilty of 12 other charges related to the shooting.
The jury started deliberations on Monday morning, according to court records. Erickson's trial began on May 27 after three days of jury selection.
Police say Erickson and Alec McKinney entered STEM School Highlands Ranch near Denver on May 7, 2019, and opened fire. Kendrick Castillo, an 18-year-old student, was killed and eight people were injured.
Erickson was 18 and McKinney was 16 when they opened fire at the school. McKinney pleaded guilty in early 2020 to 17 counts, including murder charges.
McKinney said he was born a female but was transitioning to male, and he targeted specific students who called him "disgusting" for undergoing that process, according to a probable cause affidavit. His attorneys have said he identifies as male.