The 19-year-old suspected of carrying out a mass shooting at a Florida high school Wednesday was booked into the Broward County Jail on Thursday morning. Nikolas Cruz is facing 17 counts of premeditated murder, according to records. Cruz is a former student at Marjory Stoneman Douglas High School in Parkland, Fla., where law enforcement said he carried out a deadly rampage Wednesday, killing 17 and wounding others.