There are numerous reports the teen was killed by his own family.
Via Truth Revolt:
Hamas, the terrorist group whose participation in the Palestinian Authority government was blessed by President Obama, is using the death of Muhammad Abu Khdeir, the Arab boy found dead in Jerusalem on Wednesday, to further incite people to hate Jews. In a Thursday article in the official Hamas newspaper Al-Risalah, Editor Wisam ‘Afifa used the ancient anti-Semitic blood libel to explain the murder whose perpetrator and motivation are still unknown, writing, “Just as the Jews once killed non-Jews to use their blood for matzos, today they still engage in ‘sacred rites’ of vengeance.” He added that Israel has adopted the ideology of the Nazis, who distinguished between superior and inferior races.