Madam Pomfrey now came walking briskly up the dark ward to Harry’s bed. He turned to look at her. She was carrying the largest block of chocolate he had ever seen in his life. It looked like a small boulder.
“Ah, you’re awake!” she said briskly. She placed the chocolate on Harry’s bedside table and began breaking it apart with a small hammer.
“How’s Ron?” said Harry and Hermione together.
“He’ll live,” said Madam Pomfrey grimly. “As for you two . . . you’ll be staying here until I’m satisfied you’re — Potter, what do you think you’re doing?”
Harry was sitting up, putting his glasses back on, and picking up his wand. “I need to see the headmaster,” he said.
“Potter,” said Madam Pomfrey soothingly, “it’s all right. They’ve got Black. He’s locked away upstairs. The dementors will be performing the Kiss any moment now —” Rowling, J.K. Harry Potter and the Prisoner of Azkaban (p. 157). Pottermore Publishing. Kindle Edition.

They sensed, and felt the demons leave the castle, and heard Fudge congratulating Snape on the capture of the criminal. And felt two rings forming on his left hand. One he somehow knew from what it was telling him was the Black Lordship Ring. And was on his ring finger. The other, the Potter Family Lordship Ring, and was on his middle finger. He heard an “Oh dear some aren’t going to like that,” as his mind and magic were overflowing and he fugued out for a bit.

When he became fully conscious, it was almost time for the leaving feast and Dumbledore kept trying to tell him he would have to return to his relatives. In fact, he, as his guardian, was ordering it so.
Harry kept mute on both Ring’s advice, and Dumbledore took it as his following orders and left him alone.
Instead, the Potter Ring’s eldest advisor whispered what to do, and how to go about it.

At the beginning of the Leaving Feast, The House of the Lion was again in the lead and celebrating when the school bells were set off. And the lights dimmed. The ceiling lit up with full sound and from where Snape sat, he started to shout about ending this immediately or he would reign hell down on everyone.

It showed the FULL unvarnished confrontation in the shack, and just how much Snape actually saw, and how much he lied.
And that the ministry had an innocent man, a Lord of a Founding House Kissed on the basis of his testimony. A Lord who had never had a trial. And who Snape held a schoolboy grudge with. And now, was not only dead, but his SOUL was destroyed as well. Over a schoolboy grudge.
Anger was building as doors and windows in the hall went into lockdown so he could not leave. And no matter what order his patron and savior/lover gave, it was no use, the castle wasn’t ignoring him.
Murder most foul had been committed within her walls and he was complicit. She wasn’t having it anymore and had stripped the wards from him at that moment till a more worthy individual could be found none would hold that seat in her stead.
Fawkes was summoned away from him, and his lovely tower of stolen goods was permanently locked away from him. His grotesque turned inwards so no entry allowed. The same with Journeyman Snape’s rooms.

At the Lion’s table, a young man who went through his 13-year maturity early stood, pointed his left hand that held his Family Rings flashing in the light.

The ceiling switched to show Lily Potter facing off against the Dark Lord and being killed by the Killing Curse and backlash hitting the baby in the crib and the Dark Lord. To the screams of those in the room. A short time of blackness, then open into, again, Snape. This time holding the body of Lily and demanding why she had to stand defiant instead of giving in to be his forever as had been promised by his Masters.
His noticing the baby Harry awake and pointing his sparking wand at the toddler, only to flee at the sound of visitors screaming James’ name.
Then greying out.

The anger grew exponentially against the man, who kept looking for a way out.

Fading into the more recent conversation with the minister,
They’ve got away with a great deal before now. . . . I’m afraid it’s given them a rather high opinion of themselves . . . and of course Potter has always been allowed an extraordinary amount of license by the headmaster —”
“Ah, well, Snape . . . Harry Potter, you know . . . we’ve all got a bit of a blind spot where he’s concerned.”
“And yet — is it good for him to be given so much special treatment? Personally, I try and treat him like any other student. And any other student would be suspended — at the very least — for leading his friends into such danger. Consider, Minister — against all school rules — after all the precautions put in place for his protection — out-of-bounds, at night, consorting with a werewolf and a murderer — and I have reason to believe he has been visiting Hogsmeade illegally too —”
“Well, well . . . we shall see, Snape, we shall see. . . . The boy has undoubtedly been foolish. . . .” Rowling, J.K. Harry Potter and the Prisoner of Azkaban (p. 156). Pottermore Publishing. Kindle Edition.

And fading to grey again.

“Shocking business . . . shocking . . . miracle none of them died . . . never heard the like . . . by thunder, it was lucky you were there, Snape. . . .”
“Thank you, Minister.”
“Order of Merlin, Second Class, I’d say. First Class, if I can wangle it!” Rowling, J.K. Harry Potter and the Prisoner of Azkaban (p. 156). Pottermore Publishing. Kindle Edition.

“Severus Tobias Prince Snape of the House of Prince, for your crimes against the House Potter and Black, for your crimes against the life-debt owed to the House Potter, I call upon Lady Magic Herself in Judgement of YOUR crimes, so asks the House of Black and Potter.”

A bright light shown down from the ceiling freezing him in place, and then he began to scream the scream of the damned as he twisted and squirmed and changed forms into a contorted pained filled leper and banished to the ends of the earth.

Leaving silence in her wake. And Lord Black-Potter staring directly at Malfoy, pointing at the ceiling as it replayed his mother’s death over and over again. Her high-pitched cries to save her baby coming out till everyone covered their ears.

The sudden quiet was deafening in its own way, and in that silence, “So, Malfoy, now you too can hear my mother’s screams when the Dementors are near you. Just like I can. You too can see your precious Dark Lord kill an innocent woman. Does that fill YOU with manliness now?”
And sat down in his seat.

The lockdown ended and the lights came up, but no one felt like celebrating now.