The Perry High School shooter tried to live-stream his actions, according to a new report

A law enforcement investigative report into a deadly shooting at a small-town Iowa high school in January reveals new details about the shooting, including that the teenage shooter tried to live-stream his actions .

The town of Perry, located about 40 miles (65 kilometers) northwest of Des Moines, was rocked when 17-year-old Perry High School student Dylan Butler opened fire on students and staff before the classes start on January 4, the first day of school after the winter holidays. Butler killed himself with a single shot minutes after he started shooting.

The shooting took place in the common area of ​​the school, where about 50 students and staff had gathered for breakfast before classes. According to the report, Butler arrived at the school at 7:12 a.m. with a concealed shotgun, revolver, knife and homemade explosive device and immediately went to a bathroom near the common area. While in the restroom, Butler posted on social media and began live streaming, the report said without detailing the nature of the posts or the content of the live stream.

He came out 23 minutes later with the shotgun and started shooting. In the first 24 seconds, Butler fatally shot Ahmir Jolliff, an 11-year-old sixth-grader, and wounded four other students and Perry Middle School Principal Dan Marburger, according to the report.

The report, written by the Dallas County District Attorney’s office and a summary of multi-agency investigations, warns readers of the disturbing details it contains. The report also confirms the heroic actions of Marburger and others to intervene, detailing how the principal and assistant principal Brad Snowgren moved to the source of the gunfire when it began.

According to the report, Snowgren activated an alarm notifying first responders of an active shooting at the school 10 seconds after the first shot was fired and 25 seconds before the first call to 911. The first police officer entered the ‘school in less than two minutes. Officials had initially reported that law enforcement entered the school in “less than seven minutes.”

The report says Marburger, who was reportedly wounded in the shooting, had a chance to escape the building but stayed inside and begged Butler to stop shooting. More than a minute later, the injured Marburger faced Butler again. Butler responded by shooting and seriously wounding Marburger, who then made his way out. Marburger died days later at a Des Moines hospital from his injuries.

Dallas County District Attorney Jeannine Ritchie said her office has concluded that Butler acted alone and that the investigation found no evidence that anyone had specific knowledge of Butler’s plans or aided him in the shooting. Investigators also have not determined how or where Butler obtained the shotgun he used, but said evidence suggests it came from “outside his home and was taken without the owner’s permission or knowledge.”

“The evidence suggests that his actions that morning were indiscriminate and motivated by a desire to kill himself with the hostile intent to take others with him,” Ritchie wrote.

Although school staff had frequent interactions with Butler, according to the report, they had no reports of Butler’s intentions on the day of the shooting. Butler was not the subject of any prior police investigations, threat assessments or intelligence briefings, according to the report.