The 19-year-old Cruz is scheduled for formal arraignment Wednesday on a 34-count indictment, including 17 first-degree murder charges.
Another factor: "The capital felony was a homicide and was committed in a cold, calculated and premeditated manner without any pretense of moral or legal justification".
Cruz, 19, is accused of killing 17 people at Marjory Stoneman Douglas High School with an AR-15 assault rifle on February 14.
But in a filing in Circuit Court in Broward County, Mr. Satz cited seven aggravating factors that he said prosecutors would prove and that would make Mr. Cruz eligible for execution.
That includes a deadline for filings like those, which could come into play since it is widely reported that Mr Cruz has battled with mental illness and depression in the past, especially following the November death of his adoptive mother.
This decision means that South Florida will likely see a lengthy prosecution with emotional testimony about what unfolded inside Marjory Stoneman Douglas High School.
The shooting has sparked a fierce national debate over gun rights, with numerous student survivors vowing to push for gun control regulations so that the shooting they lived through might be the last.
The teen confessed to being the gunman, according to a probable cause affidavit released shortly after his arrest. On Wednesday, students across the nation intend to walk out of schools in solidarity with the Parkland students and to demand tougher gun control laws.
Tuesday's news comes one day before the one-month anniversary of the mass shooting at Marjory Stoneman Douglas.