Parkland school shooter Nikolas Cruz signs a document at the defense table during his appearance at the Broward County Courthouse in Fort Lauderdale, Florida, U.S. October 20, 2021. Cruz pleaded guilty to 17 counts of murder and 17 counts of attempted murder in the 2018 mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida, the deadliest ever at a U.S. high school. Amy Beth Bennett/Pool via REUTERS