The sentence, handed down by the Israeli Court, comes after plea deal that had Eran pay Rivka, the victim’s mother $73,000 compensation.
After Rivka pled with the court for clemency, the charges leveled against Shiri Sobol, the victim’s twin sister, was reduced from murder to solicitation of grievous bodily harm. The 18-year-old received a six year prison sentence for her role in the vicious killing.
The co-defendants admitted to planning and executing the murder.
The saga is traced to the fact that Shiri Sobol developed “intense hatred” for her sister after a series of arguments and the return of Hili who had been away at boarding school, to the family home.
A clearly annoyed Shiri according to TimesofIsreal reports, set up the logistics of her twin sister’s assassination, watched it’s execution, then called authorities to report her sister was attacked by an unknown Arab assailant

Murder victim: 18-year-old Hili Sobol

Although born twins Hili [left], and Shiri Sobol were dissimilar in taste ans likes. They had been at loggerheads most of their life

Court documents showed that beginning in July 2015, until the time of the murder, Shiri Sobol, sent text messages to her boyfriend expressing her dislike for her twin with messages such as: “That’s it, I’m fed up with living here with that nutcase,” and “It’s hard for me to live like this when she’s here at home. It’s not her house, she should get out of my life.”
Shiri even got graphic with scenarios which ended with the death of her sister Hili, the prosecution said.
“I hope she dies already,” she allegedly wrote, and, “If only an Arab or a terrorist would stab her.” She also wrote to Eran that Hili wanted her to break off her relationship with him and had threatened that her friends would hurt him if Shiri refused. Thus the idea of getting rid of Hili was planted in Eran’s head, the prosecution claimed.
The pair allegedly planned the murder several months in advance and had made two previous unsuccessful attempts, the fateful February date.

David Eran [center], is seen during a court hearing  in Tel Aviv District Court 

Shiri Sobol confessed to planning her sister’s death

For the murder, David two knives and a change of clothes, while Shiri had the task of informing him when Hili was home.
The killer waited in the stairwell of the apartment building, put on his gloves and waylaid Hili outside the apartment, stabbed her more than 130 times all over her body.
Tragically, It was all done with the collusion and consent of the victim’s sister Shiri, who even watched the killing, the prosecution said.
Four minutes after the heinous deed, Shiri called the police to report that her sister had been stabbed by an unknown person, apparently an Arab. At the time her boyfriend was in the apartment, cleaning off blood and changing into a new set of clothing.
Shiri than hid the bloodied clothes and knives. When responding officers arrived, she spun the fable that an Arab had stabbed her sister.
The killer was hiding in their mother’s room, which Shiri had locked and told police they couldn’t enter. While in the apartment with the police officers, she texted Eran and coordinated their versions to have him tell officers that an Arab man had stabbed Hili and that he had tried to help her. At one point, the officers’ suspicions were raised and they found and arrested David.

The twin’s mother Rivka, weeps at her daughter’s funeral