Florida school shooter Nikolas Cruz calmly told a psychologist he picked Valentine’s Day for his massacre to ruin the holiday for Marjory Stoneman Douglas High School students forever

Prosecutors in the penalty trial of Florida school shooter Nikolas Cruz are about to begin their rebuttal case

Attorneys for Florida school shooter Nikolas Cruz have asked for the judge in his murder case to remove herself two days after she scolded them when they abruptly rested their case

Attorneys for Florida school shooter Nikolas Cruz have suddenly and surprisingly rested their case, leading to a shouting match after the judge accused them of a lack of professionalism

Four years before Nikolas Cruz murdered 17 people at a Florida high school, therapists at another school wrote a letter to his psychiatrist saying he was fixated on guns and dreamed of killing others and being covered in blood

Confessed Parkland school shooter Nikolas Cruz's attorney gave her opening statement to the jury on Monday.

The jury will determine if Nikolas Cruz will be sentenced to death for killing 17 people.

Attorneys for Florida school shooter Nikolas Cruz are about to present their case for why they believe he should be sentenced to life in prison and not death

The judge in penalty trial of Florida school shooter Nikolas Cruz will soon decide whether the jury will be told about some brain exams his lawyers had conducted on him

Families of Parkland victims are addressing the court Monday during the penalty phase of the confessed shooter's trial.

Families of those killed during the 2018 Parkland school shooting gave victim impact statements during the penalty phase of the gunman's trial.

Families of the Parkland mass shooting victims are addressing the jury during the penalty phase of confessed shooter Nikolas Cruz's trial.

The guard testified Nikolas Cruz flashed middle fingers and then charged at him.

Jurors in the penalty trial of Florida school shooter Nikolas Cruz have now seen the AR-15 rifle he used to murder 17 people

Eyewitnesses to the killings of 17 people by Florida school shooter Nikolas Cruz are giving heart-wrenching testimony at his penalty trial

Jurors in the penalty trial of Florida school shooter Nikolas Cruz are being shown graphic video of him murdering 17 people inside Marjory Stoneman Douglas High School

A jury will determine the fate of confessed Parkland school shooter Nikolas Cruz.

A prosecutor says the gunman who attacked the high school in Parkland, Florida, in 2018 should be executed

ABC News contributors Channa Lloyd and Robert Boyce discuss the death penalty trial of Nikolas Cruz, admitted Parkland shooter, after three months of jury selection.

Jurors on Monday were considering whether convicted school shooter Nikolas Cruz should be put to death for opening fire on students at Marjory Stoneman Douglas High School in Parkland, Florida.

ABC News contributors Channa Lloyd and Robert Boyce discuss the latest on convicted Parkland shooter Nikolas Cruz, as 12 jurors will decide whether he will get life in prison or the death penalty.

A jury will decide whether confessed Parkland school shooter Nikolas Cruz will be sentenced to death in a trial that is expected to take several months.

Nikolas Cruz faces the death penalty or life in prison after pleading guilty to murdering 17 people at Marjory Stoneman Douglas High School in 2018.

ABC News contributors Channa Lloyd and Robert Boyce discuss the death penalty trial for convicted Parkland school shooter Nikolas Cruz, who pleaded guilty to killing 17 people in 2018.

The 12 jurors will decide whether school shooter Nikolas Cruz is executed.

Manuel Oliver, whose son Joaquin Oliver was killed in Parkland, has been advocating for new gun laws.

The 12 jurors chosen this past week to decide whether Florida school shooter Nikolas Cruz is executed will be exposed to horrific images and emotional testimony, but must deal with any mental anguish alone

A jury of seven men and five women have been sworn in for the penalty trial of Florida school shooter Nikolas Cruz

Parkland school shooting survivor, Sam Fuentes, advocates for gun violence prevention and shares her thoughts on recent mass shootings.

The shooting at Robb Elementary School in Uvalde, Texas, left at least 19 children and two teachers dead.

A potential juror wore a T-shirt that could be prejudicial to his case.

Jury selection in the penalty trial of Florida school shooter Nikolas Cruz has entered its second phase with the attorneys asking questions of potential jurors individually

Eden Hebron witnessed a gunman kill a close friend and two other students.

Jury selection in the death penalty trial of Parkland school shooter Nikolas Cruz is set to resume on Monday.

Nikolas Cruz, 23, has pleaded guilty to 17 counts of murder.

Jury selection in the death penalty case of confessed Parkland school shooter Nikolas Cruz has lapsed into chaos.

Jury selection in the trial of Florida school shooter Nikolas Cruz must start over after a dispute over a possible judge's error

Jury selection in the deadliest U.S. mass shooting ever to go to trial has begun

Nikolas Cruz's jury selection is to begin after years of maneuvering and delays.

Attorneys for Florida school shooter Nikolas Cruz and prosecutors are arguing over whether his jury should tour the blood-stained, bullet-pocked classroom building where he murdered 17 people four years ago

ABC News’ Linsey Davis speaks to Manuel Oliver, father of Parkland shooting victim Joaquin Oliver, about his efforts to stop gun violence in America on the anniversary of his son’s death.

Seventeen students and staff were killed in the February 2018 Stoneman Douglas massacre.

Manuel Oliver's son, Joaquin, was killed in the mass shooting four years ago.

Manuel Oliver climbed a crane in Washington on Monday, four years after 17 people were gunned down at Stoneman Douglas High School in Parkland, Florida, to demand action on gun violence.

A judge has postponed the penalty trial for Florida school shooter Nikolas Cruz to Feb. 21

A South Florida school district will pay more than $26 million to the families of 17 people killed in the 2018 shooting massacre at Marjory Stoneman Douglas High School

A judge has rejected an attempt by Florida school shooter Nikolas Cruz’s attorneys to bar the parents of his 17 victims from testifying about the trauma the murders caused

The Department of Justice has reached a settlement with parents of the Parkland shooting victims.

The Department of Justice has reached a settlement with parents of the Parkland shooting victims.

The recent guilty plea by the shooter in the 2018 Parkland school slayings drew some renewed attention to the anti-gun March for Our Lives student movement