Americans were left heart-broken in 2021 to learn that missing 13-year-old Florida girl Tristyn Bailey was found to have been brutally murdered.

According to Fox News, the teenager who stabbed her over a hundred times learned his fate last week. 

Then 14-year-old killer broke knife in his victim

The network reported that Circuit Judge R. Lee Smith sentenced 16-year-old Aiden Fucci to life in prison on Friday for his "heinous, atrocious and cruel" crime.

"Tristyn Bailey was conscious, she was aware and she was doing everything she could to fend off this attack," Fox News quoted Smith as saying.

"She suffered a painful, horrifying death from someone that she trusted. Her screams were most likely stifled by her own suffocating lungs," he continued, adding that Fucci actually broke the tip off his knife.

"This crime had no motive," Smith pointed out. "There was no reason. There was no purpose. It was done for no other reason than to satisfy this defendant’s internal desire to feel what it was like to kill someone."

Victim's mother says her daughter's killer is "beyond saving"

Stacy Bailey is the victim's mother, and Fox News noted how she told the court last Wednesday that Fucci is "beyond saving."

"Your Honor, I plead with you, please consider everything he has done to our daughter and our family," Baily declared.

"Aiden Fucci made a heinous decision on May 9, 2021, and took the very life that I brought into this world," she stressed. "Please do not for one second think that he could be rehabilitated at any point. He is beyond saving."

Fox News also recalled how friends of Fucci had told investigators that he openly fantasized about committing murder and frequently drew pictures of mutilated bodies.

Killer mother's charged arrested for tampering with evidence

The Florida Time-Union reported that Fucci's mother, Crystal Lane Smith, wrote a letter to the judge in which she pleaded with him to "please show my Aiden mercy."

Smith is herself accused of trying to help her son get away with his crime by removing bloody clothes from his room and washing them in a sink.

Fox News reported that Smith was arrested in June of 2021 for tampering with evidence after security footage from her home showed the woman retrieving her son's clothing.

The St. Johns County Sheriff’s Office announced that it later seized Fucci's clothing as evidence and tested the sink for traces of blood.