Videos show Jonathan Martinez-Garcia attacking his teacher before dragging her into a Las Vegas classroom where he beat then tried to rape her

Videos from the day a Las Vegas teen tried to rape and strangled his teacher before attempting to slash her wrists have finally been released.

Jonathan Martinez-Garcia, 17, was sentenced to up to 40 years in jail in June after the court heard in harrowing detail how he ambushed the teacher - identified only as Sade - by asking if he could speak about his grades after class at El Dorado High School in April 2022.

The depraved teenager smirked in court as he was sentenced to prison and his victim recounted her terrifying experience.  

Surveillance video from that fateful day shows that around 1:33 p.m., 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. He then turns around as the teacher opens the door. 

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

At 3:05 p.m., an hour and a half after the attack allegedly began, Martinez-Garcia leaves the classroom with his head down and eventually leaves the school.

Bodycam footage from Clark County School District Police officers was also released to 8NewsNow. 

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. Jonathan 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, he responds 'no' before being taken into custody.

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.

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 reported.

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, the Associated Press reported. 

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.

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.'

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.

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.

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.'

Martinez-Garcia'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. 

Singulair manufacturer, Merck, is facing a slew of lawsuits that allege the company covered up links between its asthma drug and the severe effects on patients' mental health. 

Chief Deputy District Attorney William Rowles said Wednesday that he does not believe the side effect of the medication 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,' he said. 

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, The Associated Press reported. 

At the sentencing, Martinez-Garcia dressed in navy blue prison clothes apologized and said he regretted what he had done. 

He told the courtroom he blames no one but himself and said that he was ready to 'accept the consequences,' KSNV reported.