EXPLAINER: What next in the Florida school shooter trial?


              CORRECTS DATE Fred Guttenberg, seated with his wife, Jennifer, reacts during the reading of jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. The Guttenberg's daughter, Jaime, was killed in the 2018 shootings. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              CORRECTS DATE Family members of the victims are shown during jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. The Petty's daughter, Alaina, was killed in the 2018 shootings. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              CORRECTS DATE Tony Montalto, seated with his wife, Jennifer, reacts during the reading of jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. The Montalto's daughter, Gina, was killed in the 2018 shootings. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              CORRECTS DATE Judge Elizabeth Scherer reads jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Tuesday, Oct. 12, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              From left; Abby Hoyer, Tom and Gena Hoyer, and Michael Schulman react during the reading of jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. The Hoyer's son, Luke, and Schulman's son, Scott Beigel, were killed in the 2018 shootings. Abby Hoyer is Luke Hoyer's sister. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Judge Elizabeth Scherer speaks with assistant state attorney Carolyn McCann, left, and assistant public defender Tamara Curtis during jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              CORRECTS DATE - Kelly and Ryan Petty are shown as family members of the victims stand while the jury enters the courtroom for jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. The Petty's daughter, Alaina, was killed in the 2018 shootings. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Debbie Hixon, second from right, standing with Linda Beigel Schulman, left, and Michael Schulman, speaks with assistant state attorney Jeff Marcus, right, prior to jury instructions in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. The Schulman's son, Scott Beigel, and Hixon's husband, Christopher, were killed in the 2018 shootings. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Linda Beigel Schulman speaks with assistant state attorney Mike Satz prior to jury instruction in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Marjory Stoneman Douglas High School shooter Nikolas Cruz speaks with sentence mitigation specialist Kate O'Shea, a member of the defense team, during jury instructions in the penalty phase of Cruz's trial at the Broward County Courthouse in Fort Lauderdale, Fla. on Wednesday, Oct. 12, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Marjory Stoneman Douglas High School shooter Nikolas Cruz holds his head in his hands during closing arguments in the penalty phase of Cruz's trial at the Broward County Courthouse in Fort Lauderdale, Fla. on Tuesday, Oct. 11, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Assistant Public Defender Melisa McNeill gives her closing argument in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Tuesday, Oct. 11, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Assistant State Attorney Mike Satz gives his closing argument in the penalty phase of the trial of Marjory Stoneman Douglas High School shooter Nikolas Cruz at the Broward County Courthouse in Fort Lauderdale, Fla. on Tuesday, Oct. 11, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
            
              Marjory Stoneman Douglas High School shooter Nikolas Cruz is shown at the defense table after a break in closing arguments in the penalty phase of Cruz's trial at the Broward County Courthouse in Fort Lauderdale, Fla. on Tuesday, Oct. 11, 2022. Cruz previously plead guilty to all 17 counts of premeditated murder and 17 counts of attempted murder in the 2018 shootings. (Amy Beth Bennett/South Florida Sun Sentinel via AP, Pool)
EXPLAINER: What next in the Florida school shooter trial?