A law enforcement investigation report on a deadly shooting at a small-town Iowa high school in January reveals new details of the shooting, including that the teenage shooter attempted to livestream his actions.

Iowa Department of Public Safety commissioner says there was evidence of "copycat behavior" in the Jan. 4 Perry school shooting.

Authorities are holding a news conference at 10 a.m. today, during which additional information will be provided about the investigation into the Jan. 4 deadly school shooting in Perry, Iowa. We will air it live on KCCI-TV and stream it on KCCI.

The Iowa Division of Criminal Investigation will update its investigation into the Perry High School shooting during a news conference on Friday morning.

The Iowa Division of Criminal Investigation held a news conference to discuss the findings in a summary report of the fatal Perry High School shooting. The news conference was held the day after Dallas County Attorney Jeannine Ritchie released a summarized version of findings from DCI's investigation into the Jan.

Dylan Butler's attack at Perry High School lasted 4 minutes and 21 seconds. Here's a look at the newly released timeline of the events Jan. 4.

Perry High School Principal Dan Marburger was shot twice as he confronted the shooter twice during the Jan. 4 shooting at the school, according to a report released Thursday by Dallas County Attorney Jeannine Ritchie.