Parkland shooter trial: Defense details Nikolas Cruz's troubled past that left him 'damaged' prior to massacre

The lead attorney for confessed Parkland school shooter Nikolas Cruz told the jury in her opening statements on Monday that they have witnessed “things that will haunt them for the rest of their lives,” but they now need to learn what led him to massacre 17 people on Valentine's Day four years ago before they can decide whether to sentence him to death or life without parole.

Parkland shooter trial: Nikolas Cruz thinks he will get out of prison, defense mental health expert says

A defense mental health expert in the penalty trial of Parkland school shooter Nikolas Cruz said he could pinpoint when he realized the 23-year-old mass murderer still has “irrational thoughts” — the two were making small talk when Cruz began describing plans for an eventual life outside prison.

Parkland school shooter trial: Prosecution rests after 3 weeks of graphic images, painful testimony

The prosecutor seeking to sentence Parkland school shooter Nikolas Cruz to death let the facts speak for themselves as he presented his case over the past three weeks, with terrifying witness accounts, heartbreaking testimonies from grieving parents, chilling surveillance videos, gruesome crime scene photos, and finally, having the jury walk through the school building where the shooting happened – dried pools of blood and Valentine's Day cards still clinging to the floors.

Jury in Parkland shooter trial gets rare look at bloodstained school building frozen in time

Jurors in the Parkland trial toured the school building where shooter Nikolas Cruz killed 17 students and staff members on Valentine's Day in 2018. Withered roses and an abandoned teddy bear lay in the hallway next to large pools of dried blood. Nothing had been changed, except for the removal of the victims' bodies, because it was considered a court exhibit.

Parkland penalty trial jurors to visit school building where shooter killed 17 people

Jurors in the penalty trial for Florida school shooter Nikolas Cruz are expected to walk through the still blood-spattered rooms at the Parkland high school where he murdered 14 students and three staff members.

At Parkland shooter's trial, grieving father erupts in anger on the stand: 'This is not normal'

"She was supposed to get married, and I was going to have my father-daughter dance. She would've had a beautiful family... All those plans came to an end with Alyssa's murder," the grieving father said through tears on the stand. "Alyssa will always be 14."

Pinellas schools install ALERT system to decrease police response time in an emergency

Pinellas County schools already have mobile apps that act as panic buttons for school staff. now they're adding a new layer of protection to make sure officers can respond quickly.

Parkland shooter penalty trial: Jurors watch cellphone videos Nikolas Cruz made days before massacre

"Today is the day. Today it all begins. The day of my massacre shall begin," Parkland shooter Nikolas Cruz can be heard saying in one video he made the week before the shooting that left 17 dead. In another, recorded just 3 days ahead of the massacre, he says, “You’re all going to die... Can’t wait.”

Parkland shooter trial a rare, graphic look into one of the worst mass shootings in the U.S.

Few Americans outside law enforcement ever see the most graphic images from mass shootings because most of the killers die during or immediately after the attacks, so they never make it to court. That makes Parkland shooter Nikolas Cruz's trial unusual.

Parkland shooter penalty trial: Jail guard describes how Nikolas Cruz attacked him

As jurors watched jail security video, the guard described how Parkland school shooter Nikolas Cruz violently attacked him, flipping him on the ground and grabbing his Taser from his holster while in the Broward County jail.

Parkland school shooter's AR-15 rifle shown to jurors in penalty trial

Prosecutors in the penalty trial for Parkland school shooter Nikolas Cruz showed jurors photos of the horrific damage the high-speed bullets fired by his AR-15 style rifle did to some of his victims. They said they were showing the photos because they believe their graphic and horrific detail demonstrated the heinous, depraved and cruel nature of Cruz’s actions.

Parkland shooter penalty trial: Officers describe horrific massacre aftermath inside school

Law enforcement officers who charged into Parkland's Marjory Stoneman Douglas High School minutes after Nikolas Cruz killed 17 people described the horrific scene they encountered, telling jurors how they found dead and dying students and teachers as smoke and dust filled the air.

Parkland shooter penalty trial: Video showed Nikolas Cruz walking casually into shop minutes after massacre

Jurors in Nikolas Cruz's penalty trial watched video that showed him casually walking into a sandwich shop minutes after he murdered 17 people at his Parkland high school. He blended in with other fleeing students as they evacuated the campus — and even tried to get a ride from another student whose sister was seriously wounded in the mass shooting.

Parkland shooting penalty trial: Teachers weep recalling students killed in school

Teachers gave heart-wrenching testimony in the penalty trial of Nikolas Cruz, with one recalling how a boy in her Holocaust studies class correctly answered a question seconds before he became one of 17 people murdered.

Parkland school shooter trial: Jurors see video of Nikolas Cruz's 'cold, calculated and cruel' rampage

Jurors in the penalty trial of Parkland school shooter Nikolas Cruz viewed graphic security camera video of him murdering 17 people as he stalked through the building. Prosecutors said the footage showed Cruz shooting many of his victims at point-blank range, going back to some as they lay wounded on the floor to kill them with a second round of shots.

Life or death? Parkland high school shooter’s penalty trial set to begin

Four years after the deadly mass shooting that left 14 students and three staff members dead, the penalty trial for the shooter begins Monday with opening statements.

Jury is chosen to decide Parkland school shooter’s sentence

A jury of seven men and five women was tentatively chosen for a penalty trial to decide whether Florida school shooter Nikolas Cruz should be sentenced to death or get life in prison.

Judge: Jurors can see Parkland school shooter’s Instagram photos

A judge ruled that prosecutors can use the Parkland school shooter's photos posted on his public Instagram account during the penalty trial.

Broward school district to pay $26 million to Parkland shooting victims

The Broward County school district will pay more than $26 million to the families of 17 people killed and some of those injured in the 2018 Valentine's Day massacre at Marjory Stoneman Douglas High School.

Judge: Parkland school shooting victims’ families can testify

A judge rejected an attempt by Florida school shooter Nikolas Cruz’s attorneys to bar the parents and other relatives of his 17 victims from testifying before the jury.