Snead family talks about living with suspected school shooter Nikolas Cruz on Good Morning America.
PHOTO: ABC's "Good Morning America"
Snead family talks about living with suspected school shooter Nikolas Cruz on Good Morning America.
Now playing
01:12
Family talks about living with gunman
TOPSHOT - Marjory Stoneman Douglas High School staff, teachers and students return to school greeted by police and well wishers in Parkland, Florida on February 28, 2018. 
Students grieving for slain classmates prepared for an emotional return Wednesday to their Florida high school, where a mass shooting shocked the nation and led teen survivors to spur a growing movement to tighten America's gun laws. The community of Parkland, Florida, where residents were plunged into tragedy two weeks ago, steeled itself for the resumption of classes at Marjory Stoneman Douglas High School, where nearby flower-draped memorials and 17 white crosses pay tribute to the 14 students and three staff members who were murdered by a former student.
 / AFP PHOTO / RHONA WISE        (Photo credit should read RHONA WISE/AFP/Getty Images)
PHOTO: RHONA WISE/AFP/AFP/Getty Images
TOPSHOT - Marjory Stoneman Douglas High School staff, teachers and students return to school greeted by police and well wishers in Parkland, Florida on February 28, 2018. Students grieving for slain classmates prepared for an emotional return Wednesday to their Florida high school, where a mass shooting shocked the nation and led teen survivors to spur a growing movement to tighten America's gun laws. The community of Parkland, Florida, where residents were plunged into tragedy two weeks ago, steeled itself for the resumption of classes at Marjory Stoneman Douglas High School, where nearby flower-draped memorials and 17 white crosses pay tribute to the 14 students and three staff members who were murdered by a former student. / AFP PHOTO / RHONA WISE (Photo credit should read RHONA WISE/AFP/Getty Images)
Now playing
03:32
Regresan a clase los estudiantes de Parkland en medio de medidas de seguridad reforzadas
PHOTO: NBC's "Today"
Now playing
01:25
Parkland school officer: Shooting haunts me
parkland neighbor Joelle Guarino
PHOTO: CNN
parkland neighbor Joelle Guarino
Now playing
03:07
Neighbor: School gunman was pure evil
PHOTO: pool
Now playing
00:41
Watch Florida shooter make court appearance
florida shooting suspect
PHOTO: instagram
florida shooting suspect
Now playing
01:36
Authorities investigating online postings
Now playing
03:31
Tipster warned FBI of Parkland school shooter
This image made available by the Broward County Sheriff's Office on Sunday, Feb. 18, 2018, shows Sheriff Scott Israel, holding the hand of Anthony Borges, 15, a student at Marjory Stoneman Douglas High School. The teenager was shot five times during the massacre on Valentine's Day that killed 17 students. Borges is being credited with saving the lives of at least 20 other students. (Broward County Sheriff's Office via AP)
PHOTO: Broward County Sheriff's Office via AP
This image made available by the Broward County Sheriff's Office on Sunday, Feb. 18, 2018, shows Sheriff Scott Israel, holding the hand of Anthony Borges, 15, a student at Marjory Stoneman Douglas High School. The teenager was shot five times during the massacre on Valentine's Day that killed 17 students. Borges is being credited with saving the lives of at least 20 other students. (Broward County Sheriff's Office via AP)
Now playing
00:45
Last Parkland shooting patient leaves hospital
PHOTO: CNN
Now playing
01:36
Florida high school to reopen after massacre
title: File uploaded by user duration: 00:00:00 site:  author:  published:  intervention: no description:
PHOTO: Chai Center Chabad
title: File uploaded by user duration: 00:00:00 site: author: published: intervention: no description:
Now playing
01:37
Surveillance video shows gunman after shooting
PHOTO: Snapchat/MWCSFL
Now playing
00:39
Video shows students hiding as shots are fired
Now playing
02:11
Student recounts classmates being shot
Nikolas Cruz modeling his body armor.
PHOTO: From Instagram
Nikolas Cruz modeling his body armor.
Now playing
01:16
Private messages reveal Nikolas Cruz's dark side
Additional Embargo:       Additional Source(s):        Date Shot: 2/15/2018      Shipping/Billing Info:            Description:     Projects:     None    Cost Center:     Atlanta National Desk / 20100101        Created By: severc    On: 1518689865    --------------------------------------------------------------------------------
PHOTO: WPBF;
Additional Embargo: Additional Source(s): Date Shot: 2/15/2018 Shipping/Billing Info: Description: Projects: None Cost Center: Atlanta National Desk / 20100101 Created By: severc On: 1518689865 --------------------------------------------------------------------------------
Now playing
01:16
Officer describes moment he arrested shooter
PHOTO: Kaitlin Carbocci
Now playing
02:33
How the horror unfolded via text, social media
florida school shooting mother daughter reunite orig mg_00001827.jpg
PHOTO: WPTV
florida school shooting mother daughter reunite orig mg_00001827.jpg
Now playing
01:02
Mom's tearful reunion after shooting
(CNN) —  

Prosecutors will seek to put Nikolas Cruz to death for carrying out last month’s massacre at a Parkland, Florida, high school, they announced in court filings Tuesday.

A Broward County grand jury last week indicted the 19-year-old gunman on 17 counts of premeditated murder in the first degree and 17 counts of attempted murder in the first degree.

In its filing, the prosecution said that, among the aggravating factors spurring its decision, were that Cruz knowingly created a risk of death for many people, his crime was aimed at hindering “any government function or the enforcement of laws” and that the shooting was “especially heinous, atrocious or cruel.”

Read the notice of intent for yourself

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.”

02:45 - Source: CNN
School shooter's past 911 calls released

Cruz, through his attorneys, had previously expressed a willingness to plead guilty to avoid the death penalty.

Prosecutors, in Tuesday’s filing, also ask the court to put several provisions in place in the event that Cruz’s defense intends to introduce documentation or testimony regarding their client’s mental health.

This could certainly come into play as Cruz’s defense team has said he battled with mental illness and depression after his adoptive mother died.

From ‘broken child’ to mass killer

During a previous hearing, a public defender described him as a “deeply disturbed, emotionally broken” young man who is coming to grips with the pain he has caused. Classmates and others who knew him also described signs of mental illness, with some telling media outlets they outright predicted he might one day be a school shooter.

03:07 - Source: CNN
Neighbor: School gunman was pure evil

Cruz was arrested shortly after committing the Valentine’s Day killings and fleeing the Marjory Stoneman Douglas High School campus among terrified students. Seventeen students and teachers died in the shooting.

The teen confessed to being the gunman, according to a probable cause affidavit released shortly after his arrest.

Tuesday’s news comes one day before the one-month anniversary of the mass shooting at Marjory Stoneman Douglas. 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.