Newly-released video by Clark County cops shows Jonathan Martinez-Garcia, 17, ambushing his teacher in a classroom at a Las Vegas high school on April 17, 2022

Martinez-Garcia, who was 16 at the time, knocked the teacher unconscious and attempted tries to rape her He strangled her with and a cord and slashed her wrists

He also doused her in lighter fuel then shouts ‘can’t you die already’ during sadistic attack

The teen sexual predator was convicted and sentenced 16 to 40 years in jail in June, as he smirked in court

Las Vegas high school student Jonathan Martinez-Garcia, 17, is seen [photo], smirking at his sentencing. The court heard details of how he ambushed the teacher in April 2022, by asking if he could speak about his grades after class at El Dorado High School. In June he was sentenced to a max of 40 years

Newly released surveillance shows the perverse occasion, that a Las Vegas student tries to rape and strangle his teacher after shut down on a school day last year..
The suspect Jonathan Martinez-Garcia, 17, was sentenced 16 to 40 years in prison in June after he ambushed the teacher, identified only as Sade. He’d lulled his target by asking if he could speak about his grades after classes, at El Dorado High School on April 17, 2022.
The surveillance footage begins at 1:33 pm on that fateful day. It shows Martinez-Garcia, then 16, wandering the halls of the school.
He tries and fails to gain access to a classroom, then he starts walking back down the hallway.  Suddenly, he turns around and walks back to the classroom as we see Sade’s head pop out of the room, apparently talking to him. The clip cuts to her struggling with Martinez-Garcia in the doorway and being dragged back into her classroom. 

The video picks up at 3.05pm, an hour-and-a-half after the suspect walked into the classroom, Martinez-Garcia leaves the school with his head down. 
During his June 2023 sentencing, it was revealed that the deranged student knocked the teacher unconscious.
She later woke up with her pants and underwear down before the student threatened to burn her alive, prosecutors said. At one point in the attack, Martinez-Garcia told her: ‘Can’t you die already?’ 

Videos from the day a Las Vegas teen walking the school hallway, on April 17, 2022 – the day he tried to rape and strangle his teacher at school in Las Vegas

The victim [photo], identified as Sade told the court, ‘he beat my body so badly that I couldn’t fight’. The suspect knocked her unconscious, then attempted to rape her before trying to slash her wrists. He finally released her

The assailant attempted to strangle the teacher from behind with cord during the attack, along with slashing her wrists cut. Following the ordeal, the victim now suffers from chronic pain and post-traumatic stress disorder. She needs a walker to move around. 
The seemingly unrepentant teen smirked in court while his victim was recounting her terrifying experience. The perverse teen later made the same expression during his sentencing. 

A close-up of some of the bruising the teacher sustained from the violent April 7, 2022, attack. Martinez-Garcia knocked her unconscious. She later woke up with her pants and underwear down before the assailant threatened to burn her alive. At one point in the attack, he told her: ‘Can’t you die already?’ 

Throwing more light on the circumstances of the crime and subsequent arrest, bodycam footage from Clark County School District Police officers was also released to 8NewsNow this weekend.
The officer is heard seeing who he believes is Garcia-Martinez and saying: ‘Possible suspect sighting, he sees the suspect right outside of his residence right now’
‘Hey, driver turn the car off. Turn the car off. Martinez-Garcia steps out of the car.
‘You know why we’re here?’ the CCSDPD officer added as he locates the teen in a car. 
Wearing a different outfit than before, his high school ROTC uniform, he responds ‘no’ before being taken into custody.

Surveillance video from that fateful day shows at around the 1:33 pm mark, Martinez-Garcia stops in front of a classroom and looks behind him before being unable to enter the classroom and walking back down the hallway

Martinez-Garcia was walking the hallways during the early afternoon hours at Eldorado High School before eventually struggling with the teacher, ‘Sade’.

As she pulls him back into the classroom, prosecutors allege Martinez-Garcia began to attack the teacher

The details of what happened in the classroom, and out of view of the camera, were detailed during the court proceedings. 
Inside the room, the teen waited until the teacher’s back was turned before trying to choke her with a ‘rope or string’. He then slammed the young woman’s head against a table, knocking her unconscious.
When the victim awoke, her pants and underwear had been pulled down. Martinez-Garcia poured something over her saying he was going to set her on fire and then pushed a bookshelf onto the woman that he then sat on.
In court Wednesday, Sade told the judge that she believed she was going to die during the horrific ordeal that left her covered in bruises. Sade told the sentencing hearing, she has been ‘imprisoned’ mentally and physically. 
‘It only makes sense that he too should be in prison for as long as possible,’ she said, according to the Las Vegas  Review-Journal reports.

Bodycam footage from Clark County School District Police officers was also released and shows the teen being stopped by officers

Martinez-Garcia was sentenced at Vegas’ Regional Justice Center after pleading guilty to attempted murder, attempted sexual assault and battery with the use of a deadly weapon resulting in substantial bodily harm that left his victim with trauma and multiple injuries. 
Clark County District Court Judge Kathleen Delaney, sentenced Martinez-Garcia to a minimum of 16 years behind bars, rising to a maximum term of 40 years.
Prosecutors asked the judge for a minimum of 22 to 55 years behind bars. But in her sentencing, Judge Delaney said she was ‘balancing the seriousness of the crime with other factors.’
The brutal attack occurred after Martinez-Garcia went to his teacher’s classroom after school hours to discuss his grades. Police said he locked the classroom door before he viciously beat her.
The teacher told cops she asked Martinez-Garcia why he was assaulting her, and he responded that he ‘didn’t like teachers’ and was ‘getting revenge.’ 
During the attack, Martinez-Garcia attempted to slit the teacher’s wrists and told her, ‘Can’t you die already?’
He initially told cops he ‘blacked out’ and didn’t remember the attack, but later admitted he remembered trying to choke her. During the court hearing, Martinez Garcia apologized for the crime and said he should have asked for help.

Images of some of the brutal injuries Sade sustained were shown in the courtroom. 
Sade recounted: ‘He beat my body so badly that I couldn’t fight.’
‘One of the times I woke, I found myself trapped under heavy shelves that he toppled over me to where my breathing was suppressed, and I was being crushed to near death,’ she recalled. 
‘I truly believed with everything in me that I was going to die right there under those shelves.’
The victim along with several members of her family addressed the judge on Wednesday, praying the court to impose the maximum sentence on Martinez-Garcia.
In her victims impact statement, Sade’s mother told the judge her daughter used to be a gregarious woman who came from a family of educators and had moved to Vegas to begin her first teaching job.
But since the attack she has had difficulty leaving her home because of ongoing physical and mental health complications.
‘For the rest of her life, her last memory of teaching is going to be this student, trying to kill her,’ Sade’s mother told the judge.

A photo of El Dorado High School located in downtown Las Vegas where Sade worked as an educator and where Martinez-Garcia was a student 

Prosecutors said that the teacher remembers Martinez-Garcia saying repeatedly: ‘Why won’t you die?’ 
Sade told the judge that she did not return to her teaching job after the attack because she felt mentally and physically ‘imprisoned.’ 
Martinez-Garcia fled after the attack and took the teacher’s keys. The instructor was later found by a school employee who called 911. 
The teen was arrested shortly after by school police while he was on his way to an award ceremony at the school.
In April, Martinez-Garcia got a plea deal that avoided trial in the after school attack after he pled guilty to attempted sexual assault and battery with use of a deadly weapon resulting in substantial bodily harm. 
Other charges against him were also dropped.
During sentencing, the Judge rebuked Martinez-Garcia, telling him that such an attack on a teacher was totally unacceptable.
‘It is the most heinous type of crime there could be,’ the judge said. 
His mother described him as a ‘good student.’ She said he hadn’t been diagnosed with any medical or mental disabilities,’ but told police that he seemed ‘depressed and disconnected’ in recent months.
In the arrest report Martinez-Garcia talked about the attack on his teacher with detectives.
He said: ‘I don’t know why I attacked her, she was good to me.’

Jonathan Martinez-Garcia seen, [right] with his family who unsuccessfully tried to convince the court the sexual predator as a normal teen ‘with no history of anything but being a perfect loving kid,’ His mother told cops he seemed ‘depressed and disconnected’ in recent months

The suspect’s public defender, Ty Gaston, argued that his behavior was caused by severe side effects of an asthma medication, Singulair, which caused mood changes, night terrors and hallucinations. 
Chief Deputy District Attorney William Rowles countering defense argument that their client’s behavior was the side effect of the medication, said it was a valid reason for the attack. ‘I firmly believe that there are still certain crimes and still certain conduct that requires a punitive punishment,’ Rowles told the court. 
At sentencing Martinez-Garcia who smirked through the proceedings, apologized, stating that he regretted what he had done, that he blames no one but himself and was ready to ‘accept the consequences’.