A South Carolina mother who killed her two young children and her romantic rival before turning the gun on herself last month left a cruel suicide note addressed to her estranged husband, accusing him of causing her unbearable pain and expressing hatred for him.

The disturbing new details emerged this week when the Pickens County Sheriff's Office released its entire case file pertaining to the investigation into the July 13 triple murder-suicide carried out by Jessica Edens that took the lives of 9-year-old Hayden King, 5-year-old Harper Edens and 28-year-old Meredith Rahme.

It was previously reported that Edens, 36, and her husband, Ben, were in the middle of divorce proceeding last month when the wife concocted a deadly revenge plot to 'create everlasting consequences' for her spouse by killing his new girlfriend, Rahme, their children and then herself.

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Jessica Edens's suicide notes have been released, nearly a month after she killed her romantic rival Meredith Rahme (right), her own two children and herself

Innocents: Edens shot 9-year-old Hayden King (left) and 5-year-old Harper Edens (right) amid a custody battle with her estranged second husband

Act of cruelty: Among the notes left for people in her life was this message for Ben Edens, whom Jessica accused of causing her and her children pain

Pickens County Chief Deputy Creed Hashe said Jessica called Ben twice on July 13 - once around the time she killed her son and daughter, and again before committing suicide.

'She developed a plan, made her mind up and she executed that plan and it’s just very tragic for the family and we want to try to give them the best closure we can. That’s why we want to release these documents as best as we are allowed to,' Hashe told WSPA.

In her final conversation with Ben Edens, the mom-of-two told him: 'Everyone you love is gone. Do you hear me? I'm about to be gone too.'

The investigation has confirmed that Jessica Edens killed Rahme with a .40-caliber gun in the parking garage of the apartment complex where the younger woman lived, then drove 7 miles to the Greenville-Pickens Speedway, where she shot her two children in the backseat of her black Jeep SUV and ended the rampage by turning the gun on herself.

JESSICA EDENS' FULL SUICIDE NOTES: 'For my parents and sister, I am so sorry for the pain I am causing all of you,' the note read. 'You’ve all always been there for me and I love you all so much. I know what I have done is selfish, but I cannot live with this pain any longer. I just cannot handle it. It is too much. It hurts too much. I will no longer be in pain and my children will no longer hurt either. I am so so sorry. I love you all. 'To Nate, I don't know what to say. You gave me my first child. I will forever be grateful because of you. i never meant to cause you so much pain as this. I am sorry.' 'To Ben, You have caused me more pain that I’ve ever been in in my life. You have caused my children pain. i hate you. I hope you rot one day for what you have done to me and my kid. you can no longer hurt us, We are at peace. hope you live with pain and shame and guilt for the rest of your life. And I hope that everytime [sic] you look at your whore... you know that you & her did this. Live with that. Both of you.' All of us need a helping ha Advertisement

First responders found the Jeep locked and with the engine still running at around 5pm.

Deputies used a baton to break the driver’s side window in order to get inside. There, they found Edens, her son and daughter all dead.

Three suicide notes were recovered from the vehicle.

The first handwritten message was addressed to Jessica's family.

'For my parents and sister, I am so sorry for the pain I am causing all of you,' the note read. 'You’ve all always been there for me and I love you all so much. I know what I have done is selfish, but I cannot live with this pain any longer.

'I just cannot handle it. It is too much. It hurts too much. I will no longer be in pain and my children will no longer hurt either. I am so so sorry. I love you all.'

Another brief note was addressed to her first husband, Nate, whom she thanked for giving her their son Hayden and apologized for causing him pain.

A third - and most unsettling - missive was for Ben Edens: 'You have caused me more pain that I’ve ever been in in my life. You have caused my children pain. i hate you. I hope you rot one day for what you have done to me and my kid. you can no longer hurt us, We are at peace. hope you live with pain and shame and guilt for the rest of your life.'

Just days before the shootings, Jessica and Ben Edens appeared in Family Court for a hearing reportedly related to the custody of their daughter, after which officials said the wife came up with the twisted plan to get back at her husband.

In court filings, Ben claimed he had slept on the couch for almost the entire duration of their 'unloving' marriage. He also revealed that he had moved out of the family home in April.

The investigative file released by the sheriff's office on Monday in response to a Freedom of Information request submitted by the Greenville News contained numerous text message exchanges between Jessica and Ben, which were redacted because, according to Hashe, making them public would have constituted 'an unreasonable invasion of privacy.'

The shooter is believed to have accused Rahme (pictured) of being a 'homewrecker' in an anonymous online post the day before the murders

Harper (left) and Hayden (right) - Jessica's son from her first marriage - each died of a single gunshot wound to the head. Police found no signs of struggle in the back of their mother's SUV

DailyMail.com reported in July that Rahme had been the target of an anonymous online attack posted on July 12 and since deleted.

'This little girl has no self respect and no morals. She dates married men who have children and she doesn’t even want or like kids,' the vicious post attacking Rahme read.

'Her character speaks enough for her. Remember homewrecker, that karma is a b---h, just like you. You will get what you deserve,' the screed went on, posted to a website that ostensibly identifies 'homewreckers'.

Two hours after Rahme was shot, deputies found Jessica's SUV locked and running, with Edens and her two children inside, each dead from a single shot to the head seven miles away in Easley.

Hashe called it a 'graphic and horrific' scene. The .40-caliber handgun was found inside the SUV.

Rahme had called police twice less than three weeks ago to ask how she could deal with harassing text messages, phone calls and online postings from Edens.

Police approached this SUV which was locked and still running near Greenville, South Carolina, on July 13. The suicide notes were found inside

Police said Edens and her two children had fatal gunshot wounds to their heads when they discovered the three inside Edens' locked SUV with the engine running

Edens' estranged husband had called Easley police on July 12 to ask them to check on their daughter shortly after he received a disturbing text message from Edens and the two had been in court to discuss custody of the 5-year-old girl, authorities said.

The officer who went to the home found the family planning to eat popcorn and watch a movie. One of the children was speaking to the husband, according to the police report.

The officer asked Edens if there was any chance she could get back with her husband and she said instead she was going to expose his yearlong affair in court, a police report said.