In a report released Friday, the first detailed account emerged of the Parkland shooter's years in the school system, what the school district knew about him and what mistakes were made. Nearly two-thirds of the content was blacked out, but the method the district used to conceal the text failed, and the text became visible when pasted into another computer file.

In a report released Friday, the first detailed account emerged of the Parkland shooter's years in the school system, what the school district knew about him and what mistakes were made. Nearly two-thirds of the content was blacked out, but the method the district used to conceal the text failed, and the text became visible when pasted into another computer file.