Israel claimed its sniper, overlooking the compound from a third-floor window, had seen Palestinians break into the compound. According to this version, the sniper mistook the distinctive, tall, pale, red-headed, 54-year-old Hook for a Palestinian gunman, even though the sniper had been watching the UN official through telescopic sights for more than an hour.
To bolster its preposterous story, Israel also claimed the sniper had mistaken Hook's mobile phone for a hand grenade, and was worried he was about to throw it out of the compound towards the Israeli soldiers on the street outside.
Except, as the sniper would have known, that was impossible. The compound was sealed, with a high concrete wall, a petrol station forecourt-style awning as a roof, and thick chicken wire covering the space between. Had Hook thrown his phone-grenade at the street outside, it would have bounced right back at him. If it were really a grenade, he would have blown himself up.
The truth was that Hook had made an error of judgment. Surrounded by Israeli troops and Palestinian fighters hidden in alleyways nearby, and exasperated by Israel's refusal to allow his staff and the children safe passage out, he opened the gate and tried to plead with the soldiers outside.
As he did so, a Palestinian gunman emerged from an alley close by and fired towards an Israeli armoured vehicle. No one was hurt. Hook fled back into the compound and sealed it again.
But the Israeli soldiers outside now had a grudge against the UN official. One of them decided to use a bullet to Hook's head to settle the score.
Bad faith
The UN was obliged to carry out a detailed investigation into Hook's killing. Abu Akleh's loved ones will be unlikely to have the same advantage. In fact, Israeli police made a point of "raiding" her home in occupied East Jerusalem to disrupt the family's mourning, demanding that a Palestinian flag be taken down. Another message sent.
Israel is already insisting on access to the forensic evidence - as though a murderer has a right to be the one to investigate his own crime.
But in fact, even in Hook's case, the UN investigation was quietly shelved. Accusing Israel of executing a UN official would have forced the international body into a dangerous confrontation both with Israel and with the United States. Hook's killing was hushed up, and no one was brought to book.
Nothing better can be expected for Abu Akleh. There will be noises about an investigation. Israel will blame the Palestinian Authority for not cooperating, as it is already doing. Washington will express tepid concern but do nothing. Behind the scenes, the US will help Israel block any meaningful investigation.
For the US and Europe, routine statements of "sadness" and calls for investigation are not intended to make sure light is shed on what happened. That could only embarrass a strategic ally needed to project western power into the oil-rich Middle East.
No, these half-hearted declarations from western capitals are meant to defuse and confuse. They are intended to take the wind out any backlash; indicate western impartiality, and save the blushes of complicit Arab regimes; suggest there is a legal process that Israel adheres to; and subvert efforts by Palestinians and the human rights community to refer these war crimes to international bodies, such as the Hague court.
The truth is that a decades-long occupation can only survive through wanton - sometimes random, sometimes carefully calibrated - acts of terror to keep the subject population fearful and subdued. When the occupation is sponsored by the main global superpower, there is absolute impunity for those who oversee that reign of terror.
Abu Akleh is the latest victim. But these executions will continue so long as Israel and its soldiers are shielded from accountability.
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