Disclaimer: I own nothing that JK Rowling does, except possibly a toothbrush.
Lucius Malfoy sat in the Hogwarts Great Hall. It had been improvised into a triage centre, with long lines of the dead and wounded being cared for as quickly as possible. No one was being cured today, just patched up until they could be transported to St Mungos, no mean feat with the anti-apparition wards still in place and keyed to a living Headmistress.
Lucius himself had been spared anything more than minor injuries, the benefit of choosing a side that wouldn't force him to be a foot soldier. The problem being, he was on the wrong side, again. He had quickly defected after the Dark Lord fell, avoiding bodily injury, but now he faced worse peril – repeat incarceration and loss of fortune. He wasn't foolish enough to believe he might be spared, he had made no secret of his intentions and he had no doubt he would be questioned under veritaserum if he claimed to have been under imperius again. No, the real question was how far his punishment would extend.
At best he could expect heavy fines, at worst, life in Azkaban. He still had influence in the Ministry, and with the Minister coming out of his Imperiused stated there would be a few days of chaos. Chaos that Lucius could use to his advantage.
He turned to his son. Pitiful, snivelling child though he was, he had been useful to the Dark Lord and somehow managed to seem redeemable to the Golden Potter brat. And he was conveniently of age. Perhaps Lucius would make use of him as a means for securing the Malfoys' seat of power.
Five days later, Lucius Malfoy was escorted into the Chambers of the Wizengamot for a show trial. He looked up briefly as he was being pushed into the stone seat in the centre of the court. There, Draco was in the Malfoy hereditary seat. As long as the boy behaved and followed the plan, everything should go smoothly. He suppressed a shudder as magical chains wrapped his arms together with the cool stone – he could only hope his preparations had been enough.
"Lucius Malfoy" Head of DMLE Amelia Bones looked cool and composed as she stood at the front of the assembled Wizengamot, but Lucius could see a note of triumph in her eyes. "You stand accused of multiple accounts of accessory to murder, conspiracy to commit terrorism, destruction of property and aiding a known fugitive. How do you plead?"
Lucius knew this was as good as it was going to get. None of the listed crimes were enough to warrant a sealed Azkaban cell. He could expect heavy fines and a light prison sentence, and he had prepared for this. "I plead guilty, Madam Bones, but know I only did what I had to in order to protect my family. I feared that if I did not-"
"Thank you, Mr Malfoy, that will be sufficient. I would like to recommend a fine of ten per cent of the defendant's personal fortune, ten percent of the Malfoy family fortune, and eighteen months imprisonment in the Azkaban wizarding prison. Members of the Wizengamot, please raise your hands to indicate support for this sentence." Lucius watched as most of the hands in the Wizengamot seats were raised into the air. He slumped, a picture of defeat. Perfect, he thought, everything should go to plan.