Nikolas Cruz, 23, pleaded guilty in October to murdering 17 students and staff members at Parkland's Marjory Stoneman Douglas High School on February 14, 2018. His trial is to decide whether he is sentenced to death or life without parole. The trial resumes Monday after a week off.
Lead prosecutor Mike Satz played security videos of the shooting and showed the AR-15-style semiautomatic rifle Cruz used. Teachers and students testified about watching others die. He showed graphic autopsy and crime scene photos and took jurors to the still blood-stained, bullet-pocked classroom building Cruz terrorised. Parents and spouses gave tearful and angry statements about their loss.
Assistant public defender Melisa McNeill and her team have made Cruz's history their case's centrepiece, hoping at least one juror will vote for life. A death verdict must be unanimous.
The defence wants to show that from Cruz's birth to a hard-drinking, crack-smoking Fort Lauderdale prostitute, he never fully received needed help even as he grew increasingly out of control.
And nowhere was that more apparent than in the home Roger and Lynda Cruz built in Parkland, an upscale Fort Lauderdale suburb. They adopted Nikolas at birth in 1998 and, in 2000, Zachary, who had a different birth father.
Lynda Cruz, who turned 50 shortly after adopting Nikolas, was a stay-at-home mother. Roger Cruz, then 61, owned a successful marketing business.
Lynda Cruz "had wanted a child, always wanted a child. So once she got Nikolas, she felt like her family was complete," friend Trish Davaney-Westerlind testified. "He was a cute little baby. She would go and get him all these sailor outfits. She was just the happiest I ever saw."
But by preschool, Cruz showed extreme behaviour. Neighbours and teachers testified he hit and bit other children and didn't socialise. He was anxious, fell when he ran and couldn't use utensils. Nikolas started seeing psychiatrists and psychologists at age 3 and didn't fully talk or become potty trained until 4.
At 5, just as Cruz entered kindergarten, he witnessed his father suffer a fatal heart attack in the family's den. That left Lynda Cruz alone in her mid-50s with two sons who would have challenged a much younger couple.
Unemployed, she became paranoid about spending, keeping her air conditioners' thermostats at 25-30C and unplugging unused appliances. One friend said her monthly electric bill was $80, a fraction of what the owner of a large South Florida home typically pays.
She padlocked the refrigerator so her sons couldn't eat without permission and kept it so poorly stocked neighbours gave her groceries.
Friends gave conflicting testimony over whether Lynda Cruz was financially strapped or had wealth she didn't want to spend.
In either case, she had expenses other parents didn't. Cruz's mental health treatments weren't fully covered by insurance. He loved online, often violent video games, but hated losing - that's what caused him to destroy TVs and damage walls. She sometimes locked his video game console in her car as punishment — and Cruz broke at least one window to get it back.
"She was a little afraid of him," neighbour Paul Gold testified.
Despite Cruz's tantrums, Lynda Cruz told teachers and counsellors he was gentle and loving, a mama's boy. Friends testified that wasn't wholly a facade — Cruz and his mother did have a strong, often affectionate attachment and she favoured him over his brother.
Still, Zachary remained popular in the neighbourhood while Cruz was the outcast — and not just with children.
Steven Schusler testified that shortly after moving nearby, his landlord called over the Cruz boys and pointed at Nikolas, then about 10.
"He's the weird one, aren't you Nicky?" Schusler recalled the woman saying. Cruz "curled up" and "looked like a snail when you put salt on one".
But Cruz's behaviour was often strange and sometimes violent. When he was 9, a parent called police after he hit her child in the head with a rock. When his dog died after eating a poisonous toad, he went on a killing spree against the amphibians. At middle school, his outbursts disrupted classes and he plastered his homework with racist slurs, swastikas, obscenities and stick figures having sex or shooting each other.
Lynda Cruz became so overwhelmed in Cruz's early teens, a social services agency was assigned to help. That brought case manager Tiffany Forrest to the home. She said Lynda Cruz complained Nikolas wouldn't bathe, so Forrest tried to explain to him the importance of hygiene. Cruz stood up, walked outside and jumped clothed into the pool. He then climbed out.
"I showered," he told Forrest.
In the coming weeks, Cruz's attorneys are expected to present testimony about his transfer to a school for students with emotional and behavioural problems, his time at Stoneman Douglas and call his brother to the stand. Zachary now lives in Virginia with two benefactors.
Their mother died less than four months before the shooting.
