On Wednesday morning, the New Richmond, Wisconsin teen allegedly rode her bike 11 miles to the home of the 15-year-old girl, where she snuck in, beat her for hours, and eventually cut the teenager's throat.
The victim was hospitalized at Westfields Hospital, and is now being treated at Regions Hospital in St. Paul, Minnesota for "very serious injuries," according to the St. Croix County Sheriff's Office's chief deputy, Scott Knudson.
He also explained that the victim could have been killed if she wasn't found soon enough:
"If we didn't find her when we did, I think there was the potential for them to be fatal."
But this whole thing only gets more upsetting.
Kali initially told authorities that she had been abducted and assaulted by two men wearing ski masks, who she supposedly directed to the home of her brother's girlfriend in an effort to get away from them.
So when cops arrived at the house, they found the victim bleeding heavily from her face and neck.
At the hospital, the teen told the police she wasn't sure who was hurting her, but later named Kali as her attacker. She explained that she had been sleeping, and was woken up when someone covered her mouth with their hand.
While she initially thought it was her boyfriend being goofy, she quickly realized it was more vicious when the hand covered her nose as well.
The two girls began to fight, and ended up struggling on the floor, where Kali hit the victim repeatedly in the face and head.
Then, the 15-year-old claims her boyfriend's sister got two bowls and smashed them over her head. She said her assailant then used the fragments to cut her.
When she asked Kali for water, the criminal complaint reveals the younger girl told the victim "that if she got some water, in return, she would get to cut (the victim's) throat."
The teen apparently agreed because she was thirsty and already thought she was going to die.
The report also says that Kali asked her target if she preferred to "die right now" or "bleed out," and the girl admitted she wanted to bleed.
So, as Kali left, she said to her victim:
"Have a nice afterlife."
When it came to getting the 14-year-old's side of the story, she started to stick to her original tale about being kidnapped, but eventually admitted to the crime, referring to herself as "a psychopath and that (the victim) was her first kill and she was probably going to kill again."
Kali also detailed how she wore rubber gloves that morning, and waited in the living room before the attack in order to get her breathing under control.
She also confessed that she shoved things under the victim's mouth to keep her quiet.
But Kali alleged that she used the bowl shards on the girl out of "self defense," because her victim had started to fight back. However, she also admitted she to cutting the girl's neck at least four times.
In an attempt to get the story about the masked men to add up, she also forced the teen to record a voice memo for her boyfriend, where she described an attack by two male individuals.
What's even more disturbing is that Kali revealed the whole thing was premeditated, telling authorities that she had contemplated the assault for a week and a half, and rode her bike multiple times past the victim's house.
Kali is being charged as an adult for one count of attempted first-degree homicide, and will appear in court on August 8 for a preliminary hearing.
The brunette shared a sweet photo with her former flame and penned a heartbreaking caption in his memory.
The late sports star's longtime love reflected on their time together, writing:
"My deepest love goes out to those who saw jose as more than an athlete, but as a passionate, raw human being. The heart break is unbearable. There was so much more to him than anyone could even begin to understand. I'm fortunate enough to have loved and be loved by jose, and his family, for over 3 crazy beautiful years."
Miz Mendoza admitted she will always love the 24-year-old, and told her followers to never take moments with their loved ones for granted, adding: