Alyssa Bustamante, who admitted to stabbing and slitting the throat of her 9-year-old neighbor, Elizabeth Olten, wrote in her journal that it was an ahmazing and pretty enjoyable experience.

Bustamante's journal was read aloud by prosecutors and their witnesses in court on Monday as part of her sentencing hearing to determine if she should receive life in prison for her crimes that took place in Oct. 2009, reported the Associated Press.  

Bustamante, now 18, reportedly sat silently during the proceeding as law enforcement officials, prosecutors and forensic experts read her journal. Prosecutors called in a handwriting expert to read the entry. He noticed how Bustamante had used blue ink to cover up the original journal entry the night she killed her 9-year-old neighbor. He was able to determine what she wrote and read it to the court.

I just f---king killed someone. I strangled them and slit their throat and stabbed them now they're dead. I don't know how to feel atm, said handwriting as he read the journal entry. It was ahmazing. As soon as you get over the ohmygawd I can't do this feeling, it's pretty enjoyable. I'm kinda nervous and shaky though right now. Kay, I gotta go to church

FBI agents seized Bustamante's journal as evidence the day after Elizabeth went missing. Bustamante told the FBI and the Missouri State Highway Patrol that the girl may have been kidnapped.

Elizabeth's mother, Patty Preiss, and other relatives pleaded with Cole County Circuit Judge Pat Joyce to sentence Bustamante to the maximum jail time, reported the Associated Press. Preiss described her daughter as a happy, little girl, as reported by the AP. The night of murder she left home around 5 p.m. to play with Bustamante's little sister, but never returned.

So much has been lost at the hands of this evil monster, Preiss said, referring to Bustamante, who sat only feet from her. Elizabeth was given a death sentence and we were given a life sentence.

The judge had to cut off Preiss's testimony after she began to describe Bustamante as not even human, reported the Associated Press.

Law enforcement officials had suspected Bustamante as the killer. They discovered a hole in the ground in the shape of a grave near the residence. Later, Elizabeth's body was found under leaves in a shallow grave in the woods near Bustamante's house.

At a hearing in 2009, Missouri State Highway Patrol Sgt. David Rice said that Bustamante told him that she simply wanted to know what it was like to kill someone.

Charlie Moreland, Bustamante's defense attorney, said that she was a troubled girl who suffered throughout her childhood and should receive leniency. He referred to several references in the journal in which she talked about hurting herself and others.

If I don't talk about it, I bottle it up, and when I explode someone's going to die, she wrote in a journal that was read to the court by Moreland, reported the Associated Press.