A few days later, the Israeli secret police,
Shin Bet, began investigating the case.
Itamar Ben-Gvir, leader of the far-right party
Otzma Yehudit was critical of the agency's involvement: "Experience shows the Jewish Division investigates... in an aggressive and problematic manner which does not allow the truth to come out, but at most brings out false confessions." According to
The Times of Israel, the involvement of Shin Bet indicated that the authorities suspected that the attack was carried out by settlers. The investigation led Shin Bet to focus on ''Pri Ha'aretz'', a religious boarding school in
Rechelim, located close to where the stones were thrown. According to Shin Bet, far-right activists from the nearby
Yitzhar settlement drove to Pri Haaretz on Saturday morning, the day after the murder, to help the students prepare for future interrogation from Israeli authorities and to avoid revealing incriminating evidence. This was seen as suspicious because Saturday is the Jewish day of rest and most religious Jews would observe the religious injunction to not drive on that day. At the end of December 2018, the Shin Bet arrested three students from Pri Ha'aretz and interrogated them for a week without allowing them to meet with attorneys. Five days later, two more students were arrested and were also prevented from meeting with lawyers. On January 6, 2019, it was announced that the minors had been arrested on suspicion of involvement in the murder. On January 10, four of the minors were released but kept under house arrest. On January 15, a Statement of Claimant was filed in court by the prosecutor on the intention to file an indictment against the 16-year-old minor who remained in detention. During these weeks Shin Bet came under fire from settler and pro-settler groups who accused it of torturing the suspects. Shin Bet denied the allegation and released evidence from the investigation to justify why it had to keep the minors detained. Among the evidence was an Israeli flag with a swastika drawn over the Star of David and the text "Death to Zionists" written on it. On January 24, 2019, an indictment was filed against the minor on suspicion of manslaughter, stone throwing at a vehicle and intentional sabotage of a vehicle, all under the circumstances of a terrorist act. According to the indictment, the minor threw a rock that weighs close to two kilograms in order to harm vehicle passengers of Arab descent. The main evidence was a DNA sample from the suspect found on the stone that killed al-Rabi. According to the suspect the find could perhaps be explained by him spitting while walking around in the area. In May 2019, a forensic investigation concluded that the damage to Aisha al-Rabi's skull might be inconsistent with that of being hit by a single rock. The chief pathologist at the National Center of Forensic Medicine at
Abu Kabir, Dr. Hen Kugel, stated regarding the wounds: "In searching the professional literature, there was no case found in which such broad wounds [found on the victim] were the result of one strike of a stone." However, he noted that he was one of seven pathologists at Abu Kabir who studied the case and only two of them agreed with his conclusion, two found the evidence inconclusive, and two believed that the evidence indeed showed that the wounds had been caused by a single rock. The minor was subsequently released to house arrest. In May 2020, it was reported that he had been allowed to return home to his settlement in the West Bank. He has not yet been brought to trial. ==Responses==