The school shooting at Marjory Stoneman Douglas High School in Parkland, Florida left 17 people dead and 17 others wounded.
Former student Nikolas Cruz, whom has since confessed to the crimes, is now back in the news as new videos of him planning the attack have surfaced.
"I'm gonna go take Uber in the afternoon before 2:40 p.m. From there I'll go into - onto school campus, walk up the stairs, unload my bags and get my AR and shoot people down at the man - what is it? - the main courtyard, wait, and people will die," he says in his self-recorded cell phone video.
Authorities didn't say when the videos were recorded, but said that investigators found the videos on the gunman's phone after the shooting.
In another video, the gunman said he aimed to kill at least 20 people, and wanted to become "notorious" and "well-known" after it was all over.
The grand jury on the case indicted the 19-year-old on 17 counts of premeditated murder in the first degree and 17 counts of attempted murder in the first degree.