The man charged with a 2018 school shooting at a high school in Parkland, Florida, is set to plead guilty to 17 counts of first-degree murder on Wednesday.Nikolas Cruz is scheduled to enter the pleas for the Feb. 14, 2018, shootings at Marjory Stoneman Douglas High School.The 23-year-old former Stoneman Douglas student will appear before Circuit Judge Elizabeth Scherer. She will ask him one by one how he pleads to each killing.The guilty pleas will set the stage for a penalty trial in which 12 jurors will determine whether Cruz should be sentenced to death or life in prison without parole. Scherer hopes the trial can begin in January.Cruz was arrested in Parkland hours after the mass shooting at Stoneman Douglas High School that left 17 students and staff members dead. Police say he issued a confession shortly after his arrest, and video recordings he took before the massacre later emerged during which he appeared to threaten such an event.Cruz's lawyers announced his intention to enter guilty pleas at a hearing on Friday. At that hearing, Cruz also pleaded guilty to four charges linked to an incident in jail involving a Broward County Jail detention officer. According to NPR, Cruz was accused of hitting, kicking and trying to steal the stun gun of a jail guard.